Complete List of House Polls Used
Below we have a list of all the House polls used on this site. Only nonpartisan polls are used; polls taken by pollsters working for one of the parties are intentionally omitted as they tend to be more "fun with numbers" exercises rather than attempts to gauge public opinion.
The date given below in column 2 is when the poll ended. The poll length is also given. The polls for each state are sorted in descending order of their midpoints. Incumbents are denoted by asterisks.
The data are also available as plain text and in .csv format for use with Excel. In the latter, the first column is the day number of the midpoint (Jan. 1, 2008 = day 1.0) and the second is the poll length in days.
The site also has a page describing the House races, including brief descriptions of the situation, the names and photos of the candidates, and links to their campaign pages, Wikipedia entries, and state parties.
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AL-01 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| AL-01 | Democrat | 32% | Republican | 68% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AL-02 | Democrat | 50% | Republican | 49% | Nov 05 | Nov 05 | Election 2008 | |
| AL-02 | Bobby Bright | 45% | Jay Love* | 47% | Oct 20 | Oct 22 | Research 2000 | |
| AL-02 | Bobby Bright | 39% | Jay Love* | 56% | Aug 26 | Aug 28 | SurveyUSA | |
| AL-02 | Bobby Bright | 47% | Jay Love* | 37% | Aug 06 | Aug 11 | Capital Survey | |
| AL-02 | Democrat | 30% | Republican | 69% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AL-03 | Democrat | 47% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| AL-03 | Joshua Segall | 33% | Mike Rogers* | 54% | Aug 13 | Aug 18 | Capital Survey | |
| AL-03 | Democrat | 38% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AL-04 | Democrat | 25% | Republican | 75% | Nov 05 | Nov 05 | Election 2008 | |
| AL-04 | Democrat | 30% | Republican | 70% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AL-05 | Democrat | 52% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| AL-05 | Parker Griffith* | 45% | Wayne Parker | 40% | Aug 19 | Aug 21 | Capital Survey | |
| AL-05 | Parker Griffith* | 48% | Wayne Parker | 32% | Apr 01 | Apr 01 | Capital Survey | |
| AL-05 | Democrat | 98% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AL-06 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| AL-06 | Democrat | 00% | Republican | 98% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AL-07 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| AL-07 | Democrat | 99% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AK-AL | Democrat | 45% | Republican | 50% | Nov 05 | Nov 05 | Election 2008 | |
| AK-AL | Ethan Berkowitz | 53% | Don Young* | 44% | Oct 28 | Oct 30 | Research 2000 | |
| AK-AL | Ethan Berkowitz | 51% | Don Young* | 43% | Oct 17 | Oct 19 | Ivan Moore Research | |
| AK-AL | Ethan Berkowitz | 50% | Don Young* | 44% | Oct 14 | Oct 16 | Research 2000 | |
| AK-AL | Ethan Berkowitz | 51% | Don Young* | 42% | Oct 03 | Oct 06 | Ivan Moore Research | |
| AK-AL | Ethan Berkowitz | 49% | Don Young* | 44% | Sep 20 | Sep 22 | Ivan Moore Research | |
| AK-AL | Ethan Berkowitz | 53% | Don Young* | 39% | Sep 15 | Sep 17 | Research 2000 | |
| AK-AL | Ethan Berkowitz | 33% | Don Young* | 30% | Jul 24 | Jul 25 | Hays Research Group | |
| AK-AL | Democrat | 40% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-01 | Democrat | 56% | Republican | 40% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-01 | Democrat | 43% | Republican | 52% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-02 | Democrat | 37% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-02 | Democrat | 39% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-03 | Democrat | 42% | Republican | 54% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-03 | Bob Lord | 40% | John Shadegg* | 50% | Oct 20 | Oct 22 | Research 2000 | |
| AZ-03 | Bob Lord | 39% | John Shadegg* | 48% | Oct 06 | Oct 08 | Research 2000 | |
| AZ-03 | Democrat | 38% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-04 | Democrat | 72% | Republican | 21% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-04 | Democrat | 73% | Republican | 24% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-05 | Democrat | 53% | Republican | 44% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-05 | Democrat | 50% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-06 | Democrat | 35% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-06 | Democrat | 00% | Republican | 75% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-07 | Democrat | 63% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-07 | Democrat | 61% | Republican | 35% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AZ-08 | Democrat | 55% | Republican | 43% | Nov 05 | Nov 05 | Election 2008 | |
| AZ-08 | Democrat | 54% | Republican | 42% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AR-01 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| AR-01 | Democrat | 69% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AR-02 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| AR-02 | Democrat | 61% | Republican | 39% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AR-03 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| AR-03 | Democrat | 38% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| AR-04 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| AR-04 | Democrat | 75% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-01 | Democrat | 68% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| CA-01 | Democrat | 66% | Republican | 29% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-02 | Democrat | 43% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| CA-02 | Democrat | 32% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-03 | Democrat | 44% | Republican | 50% | Nov 05 | Nov 05 | Election 2008 | |
| CA-03 | Democrat | 38% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-04 | Democrat | 49% | Republican | 50% | Nov 05 | Nov 05 | Election 2008 | |
| CA-04 | Charlie Brown | 48% | Tom McClintock* | 42% | Oct 20 | Oct 22 | Research 2000 | |
| CA-04 | Charlie Brown | 46% | Tom McClintock* | 41% | Sep 23 | Sep 25 | Research 2000 | |
| CA-04 | Democrat | 46% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-05 | Democrat | 74% | Republican | 21% | Nov 05 | Nov 05 | Election 2008 | |
| CA-05 | Democrat | 71% | Republican | 24% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-06 | Democrat | 72% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| CA-06 | Democrat | 70% | Republican | 26% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-07 | Democrat | 73% | Republican | 21% | Nov 05 | Nov 05 | Election 2008 | |
| CA-07 | Democrat | 84% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-08 | Democrat | 72% | Republican | 09% | Nov 05 | Nov 05 | Election 2008 | |
| CA-08 | Democrat | 80% | Republican | 11% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-09 | Democrat | 86% | Republican | 10% | Nov 05 | Nov 05 | Election 2008 | |
| CA-09 | Democrat | 86% | Republican | 11% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-10 | Democrat | 65% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| CA-10 | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-11 | Democrat | 55% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| CA-11 | Jerry McNerney* | 52% | Dean Andal | 41% | Oct 14 | Oct 15 | SurveyUSA | |
| CA-11 | Democrat | 53% | Republican | 47% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-12 | Democrat | 75% | Republican | 19% | Nov 05 | Nov 05 | Election 2008 | |
| CA-12 | Jackie Speier* | 76% | Greg Conlon | 09% | Apr 08 | Apr 08 | Special election April 2008 | |
| CA-12 | Democrat | 76% | Republican | 24% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-13 | Democrat | 76% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| CA-13 | Democrat | 75% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-14 | Democrat | 70% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| CA-14 | Democrat | 71% | Republican | 24% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-15 | Democrat | 72% | Republican | 23% | Nov 05 | Nov 05 | Election 2008 | |
| CA-15 | Democrat | 72% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-16 | Democrat | 71% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| CA-16 | Democrat | 73% | Republican | 27% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-17 | Democrat | 75% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| CA-17 | Democrat | 76% | Republican | 23% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-18 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| CA-18 | Democrat | 65% | Republican | 35% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-19 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| CA-19 | Democrat | 39% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-20 | Democrat | 73% | Republican | 27% | Nov 05 | Nov 05 | Election 2008 | |
| CA-20 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-21 | Democrat | 32% | Republican | 68% | Nov 05 | Nov 05 | Election 2008 | |
| CA-21 | Democrat | 30% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-22 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| CA-22 | Democrat | 29% | Republican | 71% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-23 | Democrat | 68% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| CA-23 | Democrat | 65% | Republican | 35% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-24 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| CA-24 | Democrat | 38% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-25 | Democrat | 43% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| CA-25 | Democrat | 36% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-26 | Democrat | 41% | Republican | 52% | Nov 05 | Nov 05 | Election 2008 | |
| CA-26 | Democrat | 38% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-27 | Democrat | 69% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| CA-27 | Democrat | 69% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-28 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| CA-28 | Democrat | 74% | Republican | 19% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-29 | Democrat | 70% | Republican | 26% | Nov 05 | Nov 05 | Election 2008 | |
| CA-29 | Democrat | 63% | Republican | 27% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-30 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| CA-30 | Democrat | 71% | Republican | 26% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-31 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| CA-31 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-32 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| CA-32 | Democrat | 83% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-33 | Democrat | 88% | Republican | 12% | Nov 05 | Nov 05 | Election 2008 | |
| CA-33 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-34 | Democrat | 77% | Republican | 23% | Nov 05 | Nov 05 | Election 2008 | |
| CA-34 | Democrat | 77% | Republican | 23% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-35 | Democrat | 83% | Republican | 13% | Nov 05 | Nov 05 | Election 2008 | |
| CA-35 | Democrat | 84% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-36 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| CA-36 | Democrat | 63% | Republican | 32% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-37 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| CA-37 | Democrat | 82% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-38 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| CA-38 | Democrat | 75% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-39 | Democrat | 70% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| CA-39 | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-40 | Democrat | 37% | Republican | 63% | Nov 05 | Nov 05 | Election 2008 | |
| CA-40 | Democrat | 31% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-41 | Democrat | 38% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| CA-41 | Democrat | 33% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-42 | Democrat | 40% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| CA-42 | Democrat | 00% | Republican | 100% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-43 | Democrat | 68% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| CA-43 | Democrat | 64% | Republican | 36% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-44 | Democrat | 49% | Republican | 51% | Nov 05 | Nov 05 | Election 2008 | |
| CA-44 | Democrat | 37% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-45 | Democrat | 43% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| CA-45 | Democrat | 39% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-46 | Democrat | 43% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| CA-46 | Democrat | 37% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-47 | Democrat | 67% | Republican | 27% | Nov 05 | Nov 05 | Election 2008 | |
| CA-47 | Democrat | 62% | Republican | 38% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-48 | Democrat | 41% | Republican | 55% | Nov 05 | Nov 05 | Election 2008 | |
| CA-48 | Democrat | 37% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-49 | Democrat | 38% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| CA-49 | Democrat | 33% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-50 | Democrat | 46% | Republican | 50% | Nov 05 | Nov 05 | Election 2008 | |
| CA-50 | Democrat | 44% | Republican | 53% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-51 | Democrat | 72% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| CA-51 | Democrat | 67% | Republican | 30% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-52 | Democrat | 39% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| CA-52 | Democrat | 32% | Republican | 65% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CA-53 | Democrat | 69% | Republican | 27% | Nov 05 | Nov 05 | Election 2008 | |
| CA-53 | Democrat | 68% | Republican | 30% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CO-01 | Democrat | 72% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| CO-01 | Democrat | 80% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CO-02 | Democrat | 62% | Republican | 34% | Nov 05 | Nov 05 | Election 2008 | |
| CO-02 | Democrat | 68% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CO-03 | Democrat | 61% | Republican | 39% | Nov 05 | Nov 05 | Election 2008 | |
| CO-03 | Democrat | 62% | Republican | 37% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CO-04 | Democrat | 56% | Republican | 44% | Nov 05 | Nov 05 | Election 2008 | |
| CO-04 | Betsey Markey | 50% | Marilyn Musgrave* | 43% | Aug 22 | Aug 24 | SurveyUSA | |
| CO-04 | Democrat | 43% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CO-05 | Democrat | 37% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| CO-05 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CO-06 | Democrat | 40% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| CO-06 | Democrat | 40% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CO-07 | Democrat | 63% | Republican | 37% | Nov 05 | Nov 05 | Election 2008 | |
| CO-07 | Democrat | 55% | Republican | 42% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CT-01 | Democrat | 72% | Republican | 26% | Nov 05 | Nov 05 | Election 2008 | |
| CT-01 | Democrat | 74% | Republican | 26% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CT-02 | Democrat | 65% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| CT-02 | Joe Courtney* | 55% | Sean Sullivan | 27% | Sep 22 | Sep 28 | U. of Connecticut | |
| CT-02 | Democrat | 50% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CT-03 | Democrat | 77% | Republican | 20% | Nov 05 | Nov 05 | Election 2008 | |
| CT-03 | Democrat | 76% | Republican | 22% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CT-04 | Democrat | 51% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| CT-04 | Jim Himes | 44% | Chris Shays* | 44% | Oct 08 | Oct 15 | U. of Connecticut | |
| CT-04 | Jim Himes | 48% | Chris Shays* | 45% | Oct 13 | Oct 14 | SurveyUSA | |
| CT-04 | Jim Himes | 31% | Chris Shays* | 41% | Sep 22 | Sep 25 | Sacred Heart U. | |
| CT-04 | Democrat | 48% | Republican | 51% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| CT-05 | Democrat | 59% | Republican | 39% | Nov 05 | Nov 05 | Election 2008 | |
| CT-05 | Democrat | 54% | Republican | 44% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| DE-AL | Democrat | 38% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| DE-AL | Democrat | 39% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-01 | Democrat | 30% | Republican | 70% | Nov 05 | Nov 05 | Election 2008 | |
| FL-01 | Democrat | 31% | Republican | 69% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-02 | Democrat | 62% | Republican | 38% | Nov 05 | Nov 05 | Election 2008 | |
| FL-02 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-03 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| FL-03 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-04 | Democrat | 35% | Republican | 65% | Nov 05 | Nov 05 | Election 2008 | |
| FL-04 | Democrat | 30% | Republican | 70% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-05 | Democrat | 39% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| FL-05 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-06 | Democrat | 39% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| FL-06 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-07 | Democrat | 38% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| FL-07 | Democrat | 37% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-08 | Democrat | 52% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| FL-08 | Democrat | 46% | Republican | 53% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-09 | Democrat | 36% | Republican | 63% | Nov 05 | Nov 05 | Election 2008 | |
| FL-09 | Democrat | 44% | Republican | 56% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-10 | Democrat | 39% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| FL-10 | Democrat | 34% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-11 | Democrat | 70% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| FL-11 | Democrat | 70% | Republican | 30% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-12 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| FL-12 | Democrat | 00% | Republican | 69% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-13 | Democrat | 38% | Republican | 55% | Nov 05 | Nov 05 | Election 2008 | |
| FL-13 | Christine Jennings | 34% | Vern Buchanan* | 45% | Oct 20 | Oct 22 | Research 2000 | |
| FL-13 | Christine Jennings | 33% | Vern Buchanan* | 49% | Sep 30 | Oct 01 | SurveyUSA | |
| FL-13 | Christine Jennings | 31% | Vern Buchanan* | 43% | Sep 23 | Sep 25 | Research 2000 | |
| FL-13 | Democrat | 49% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-14 | Democrat | 25% | Republican | 59% | Nov 05 | Nov 05 | Election 2008 | |
| FL-14 | Democrat | 36% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-15 | Democrat | 42% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| FL-15 | Democrat | 44% | Republican | 56% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-16 | Democrat | 40% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| FL-16 | Democrat | 50% | Republican | 48% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-17 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| FL-17 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-18 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| FL-18 | Annette Taddeo | 36% | Ileana Ros-Lehtinen* | 53% | Sep 23 | Sep 25 | Research 2000 | |
| FL-18 | Annette Taddeo | 31% | Ileana Ros-Lehtinen* | 58% | Jun 06 | Jun 22 | Bendixen | |
| FL-18 | Democrat | 38% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-19 | Democrat | 66% | Republican | 27% | Nov 05 | Nov 05 | Election 2008 | |
| FL-19 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-20 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| FL-20 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-21 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| FL-21 | Raul Martinez | 44% | Lincoln Diaz-Balart* | 45% | Oct 20 | Oct 23 | Research 2000 | |
| FL-21 | Raul Martinez | 43% | Lincoln Diaz-Balart* | 48% | Sep 27 | Oct 01 | Telemundo | |
| FL-21 | Raul Martinez | 48% | Lincoln Diaz-Balart* | 46% | Aug 24 | Aug 26 | SurveyUSA | |
| FL-21 | Raul Martinez | 37% | Lincoln Diaz-Balart* | 44% | Jun 06 | Jun 22 | Bendixen | |
| FL-21 | Democrat | 41% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-22 | Democrat | 55% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| FL-22 | Democrat | 51% | Republican | 47% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-23 | Democrat | 82% | Republican | 18% | Nov 05 | Nov 05 | Election 2008 | |
| FL-23 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-24 | Democrat | 57% | Republican | 41% | Nov 05 | Nov 05 | Election 2008 | |
| FL-24 | Democrat | 42% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| FL-25 | Democrat | 47% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| FL-25 | Joe Garcia | 43% | Mario Diaz-Balart* | 46% | Oct 20 | Oct 22 | Research 2000 | |
| FL-25 | Joe Garcia | 41% | Mario Diaz-Balart* | 43% | Sep 27 | Oct 01 | Telemundo | |
| FL-25 | Joe Garcia | 41% | Mario Diaz-Balart* | 45% | Sep 23 | Sep 25 | Research 2000 | |
| FL-25 | Joe Garcia | 39% | Mario Diaz-Balart* | 44% | Jun 06 | Jun 22 | Bendixen | |
| FL-25 | Democrat | 42% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-01 | Democrat | 33% | Republican | 67% | Nov 05 | Nov 05 | Election 2008 | |
| GA-01 | Democrat | 32% | Republican | 69% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-02 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| GA-02 | Democrat | 68% | Republican | 32% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-03 | Democrat | 34% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| GA-03 | Democrat | 32% | Republican | 68% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-04 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| GA-04 | Democrat | 75% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-05 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| GA-05 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-06 | Democrat | 31% | Republican | 69% | Nov 05 | Nov 05 | Election 2008 | |
| GA-06 | Democrat | 28% | Republican | 72% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-07 | Democrat | 38% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| GA-07 | Democrat | 29% | Republican | 71% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-08 | Democrat | 57% | Republican | 43% | Nov 05 | Nov 05 | Election 2008 | |
| GA-08 | Jim Marshall* | 49% | Rick Goddard | 45% | Oct 25 | Oct 26 | SurveyUSA | |
| GA-08 | Democrat | 51% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-09 | Democrat | 24% | Republican | 76% | Nov 05 | Nov 05 | Election 2008 | |
| GA-09 | Democrat | 23% | Republican | 77% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-10 | Democrat | 39% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| GA-10 | Bobby Saxon | 00% | Paul Broun, Jr* | 100% | Jan 01 | Jan 01 | Special election July 2007 | |
| GA-10 | Democrat | 33% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-11 | Democrat | 32% | Republican | 68% | Nov 05 | Nov 05 | Election 2008 | |
| GA-11 | Democrat | 29% | Republican | 71% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-12 | Democrat | 66% | Republican | 34% | Nov 05 | Nov 05 | Election 2008 | |
| GA-12 | Democrat | 50% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| GA-13 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| GA-13 | Democrat | 69% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| HI-01 | Democrat | 77% | Republican | 19% | Nov 05 | Nov 05 | Election 2008 | |
| HI-01 | Democrat | 69% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| HI-02 | Democrat | 76% | Republican | 20% | Nov 05 | Nov 05 | Election 2008 | |
| HI-02 | Democrat | 61% | Republican | 39% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| ID-01 | Democrat | 51% | Republican | 49% | Nov 05 | Nov 05 | Election 2008 | |
| ID-01 | Walt Minnick | 51% | Bill Sali* | 45% | Oct 18 | Oct 19 | SurveyUSA | |
| ID-01 | Walt Minnick | 35% | Bill Sali* | 46% | Sep 17 | Sep 18 | Research 2000 | |
| ID-01 | Democrat | 45% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| ID-02 | Democrat | 29% | Republican | 71% | Nov 05 | Nov 05 | Election 2008 | |
| ID-02 | Democrat | 34% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-01 | Democrat | 86% | Republican | 14% | Nov 05 | Nov 05 | Election 2008 | |
| IL-01 | Democrat | 84% | Republican | 16% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-02 | Democrat | 89% | Republican | 11% | Nov 05 | Nov 05 | Election 2008 | |
| IL-02 | Democrat | 85% | Republican | 12% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-03 | Democrat | 73% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| IL-03 | Democrat | 77% | Republican | 23% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-04 | Democrat | 81% | Republican | 11% | Nov 05 | Nov 05 | Election 2008 | |
| IL-04 | Democrat | 86% | Republican | 14% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-05 | Democrat | 74% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| IL-05 | Democrat | 78% | Republican | 22% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-06 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| IL-06 | Democrat | 49% | Republican | 51% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-07 | Democrat | 85% | Republican | 15% | Nov 05 | Nov 05 | Election 2008 | |
| IL-07 | Democrat | 87% | Republican | 13% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-08 | Democrat | 60% | Republican | 40% | Nov 05 | Nov 05 | Election 2008 | |
| IL-08 | Democrat | 51% | Republican | 44% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-09 | Democrat | 75% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| IL-09 | Democrat | 75% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-10 | Democrat | 46% | Republican | 54% | Nov 05 | Nov 05 | Election 2008 | |
| IL-10 | Dan Seals | 49% | Mark Kirk* | 43% | Oct 20 | Oct 22 | Research 2000 | |
| IL-10 | Dan Seals | 52% | Mark Kirk* | 44% | Oct 04 | Oct 05 | SurveyUSA | |
| IL-10 | Dan Seals | 38% | Mark Kirk* | 44% | Sep 30 | Oct 01 | Research 2000 | |
| IL-10 | Democrat | 47% | Republican | 53% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-11 | Democrat | 58% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| IL-11 | Democrat | 45% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-12 | Democrat | 71% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| IL-12 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-13 | Democrat | 44% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| IL-13 | Democrat | 42% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-14 | Democrat | 57% | Republican | 43% | Nov 05 | Nov 05 | Election 2008 | |
| IL-14 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-15 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| IL-15 | Democrat | 42% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-16 | Democrat | 36% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| IL-16 | Democrat | 32% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-17 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| IL-17 | Democrat | 57% | Republican | 43% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-18 | Democrat | 38% | Republican | 59% | Nov 05 | Nov 05 | Election 2008 | |
| IL-18 | Democrat | 33% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IL-19 | Democrat | 33% | Republican | 65% | Nov 05 | Nov 05 | Election 2008 | |
| IL-19 | Democrat | 39% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-01 | Democrat | 71% | Republican | 27% | Nov 05 | Nov 05 | Election 2008 | |
| IN-01 | Democrat | 70% | Republican | 27% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-02 | Democrat | 67% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| IN-02 | Joe Donnelly* | 53% | Luke Puckett | 35% | Sep 29 | Sep 30 | Research 2000 | |
| IN-02 | Democrat | 54% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-03 | Democrat | 40% | Republican | 55% | Nov 05 | Nov 05 | Election 2008 | |
| IN-03 | Michael Montagano | 44% | Mark Souder* | 42% | Oct 23 | Oct 24 | Howey-Gauge | |
| IN-03 | Michael Montagano | 40% | Mark Souder* | 45% | Oct 16 | Oct 18 | Research 2000 | |
| IN-03 | Democrat | 46% | Republican | 54% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-04 | Democrat | 40% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| IN-04 | Democrat | 38% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-05 | Democrat | 34% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| IN-05 | Democrat | 31% | Republican | 65% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-06 | Democrat | 33% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| IN-06 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-07 | Democrat | 65% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| IN-07 | Andre Carson* | 53% | Gabrielle Campo | 38% | Oct 24 | Oct 28 | Research 2000 | |
| IN-07 | Andre Carson* | 51% | Gabrielle Campo | 35% | Sep 29 | Oct 03 | Research 2000 | |
| IN-07 | Andre Carson* | 54% | Gabrielle Campo | 43% | Mar 11 | Mar 11 | Special election March 2008 | |
| IN-07 | Democrat | 54% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-08 | Democrat | 65% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| IN-08 | Democrat | 61% | Republican | 39% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IN-09 | Democrat | 58% | Republican | 38% | Nov 05 | Nov 05 | Election 2008 | |
| IN-09 | Baron Hill* | 53% | Mike Sodrel | 40% | Oct 24 | Oct 28 | Research 2000 | |
| IN-09 | Baron Hill* | 54% | Mike Sodrel | 39% | Oct 22 | Oct 23 | SurveyUSA | |
| IN-09 | Baron Hill* | 53% | Mike Sodrel | 38% | Oct 04 | Oct 05 | SurveyUSA | |
| IN-09 | Baron Hill* | 49% | Mike Sodrel | 37% | Sep 29 | Oct 03 | Research 2000 | |
| IN-09 | Baron Hill* | 50% | Mike Sodrel | 39% | Sep 08 | Sep 10 | SurveyUSA | |
| IN-09 | Baron Hill* | 49% | Mike Sodrel | 42% | Jul 28 | Jul 30 | SurveyUSA | |
| IN-09 | Baron Hill* | 51% | Mike Sodrel | 40% | Jun 16 | Jun 18 | SurveyUSA | |
| IN-09 | Democrat | 50% | Republican | 45% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IA-01 | Democrat | 64% | Republican | 36% | Nov 05 | Nov 05 | Election 2008 | |
| IA-01 | Democrat | 55% | Republican | 43% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IA-02 | Democrat | 57% | Republican | 39% | Nov 05 | Nov 05 | Election 2008 | |
| IA-02 | Democrat | 51% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IA-03 | Democrat | 56% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| IA-03 | Democrat | 52% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IA-04 | Democrat | 39% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| IA-04 | Becky Greenwald | 42% | Tom Latham* | 47% | Oct 20 | Oct 22 | Research 2000 | |
| IA-04 | Democrat | 43% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| IA-05 | Democrat | 37% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| IA-05 | Democrat | 36% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KS-01 | Democrat | 13% | Republican | 82% | Nov 05 | Nov 05 | Election 2008 | |
| KS-01 | James Bordonaro | 13% | Jerry Moran* | 77% | Aug 17 | Aug 19 | SurveyUSA | |
| KS-01 | Democrat | 20% | Republican | 79% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KS-02 | Democrat | 46% | Republican | 51% | Nov 05 | Nov 05 | Election 2008 | |
| KS-02 | Nancy Boyda* | 50% | Lynn Jenkins | 43% | Aug 19 | Aug 21 | SurveyUSA | |
| KS-02 | Democrat | 51% | Republican | 47% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KS-03 | Democrat | 56% | Republican | 40% | Nov 05 | Nov 05 | Election 2008 | |
| KS-03 | Dennis Moore* | 53% | Nick Jordan | 42% | Oct 25 | Oct 26 | SurveyUSA | |
| KS-03 | Democrat | 65% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KS-04 | Democrat | 32% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| KS-04 | Donald Betts, Jr. | 29% | Todd Tiahrt* | 62% | Oct 20 | Oct 21 | SurveyUSA | |
| KS-04 | Donald Betts, Jr. | 30% | Todd Tiahrt* | 61% | Aug 17 | Aug 19 | SurveyUSA | |
| KS-04 | Democrat | 34% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KY-01 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| KY-01 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KY-02 | Democrat | 47% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| KY-02 | David Boswell | 43% | Brett Gurthrie* | 53% | Oct 27 | Oct 28 | SurveyUSA | |
| KY-02 | David Boswell | 42% | Brett Gurthrie* | 51% | Oct 15 | Oct 16 | SurveyUSA | |
| KY-02 | David Boswell | 43% | Brett Gurthrie* | 49% | Sep 24 | Sep 25 | SurveyUSA | |
| KY-02 | David Boswell | 47% | Brett Gurthrie* | 44% | Jun 27 | Jun 29 | SurveyUSA | |
| KY-02 | Democrat | 45% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KY-03 | Democrat | 59% | Republican | 41% | Nov 05 | Nov 05 | Election 2008 | |
| KY-03 | John Yarmuth* | 57% | Anne Northup | 41% | Oct 21 | Oct 22 | SurveyUSA | |
| KY-03 | John Yarmuth* | 57% | Anne Northup | 41% | Oct 14 | Oct 15 | SurveyUSA | |
| KY-03 | John Yarmuth* | 53% | Anne Northup | 45% | Sep 05 | Sep 07 | SurveyUSA | |
| KY-03 | John Yarmuth* | 53% | Anne Northup | 43% | Jul 18 | Jul 20 | SurveyUSA | |
| KY-03 | John Yarmuth* | 57% | Anne Northup | 40% | Jun 06 | Jun 08 | SurveyUSA | |
| KY-03 | Democrat | 51% | Republican | 48% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KY-04 | Democrat | 37% | Republican | 63% | Nov 05 | Nov 05 | Election 2008 | |
| KY-04 | Michael Kelley | 37% | Geoff Davis* | 58% | Oct 26 | Oct 27 | SurveyUSA | |
| KY-04 | Michael Kelley | 36% | Geoff Davis* | 58% | Sep 30 | Oct 01 | SurveyUSA | |
| KY-04 | Michael Kelley | 41% | Geoff Davis* | 54% | Jun 28 | Jun 30 | SurveyUSA | |
| KY-04 | Democrat | 43% | Republican | 52% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KY-05 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| KY-05 | Democrat | 26% | Republican | 74% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| KY-06 | Democrat | 65% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| KY-06 | Democrat | 85% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| LA-01 | Democrat | 34% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| LA-01 | Jim Harlan | 25% | Steve Scalise* | 73% | May 03 | May 03 | Special election May 2008 | |
| LA-01 | Democrat | 07% | Republican | 88% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| LA-02 | Democrat | 47% | Republican | 50% | Nov 05 | Nov 05 | Election 2008 | |
| LA-02 | Democrat | 30% | Republican | 13% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| LA-03 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| LA-03 | Democrat | 55% | Republican | 40% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| LA-04 | Democrat | 47% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| LA-04 | Democrat | 17% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| LA-05 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| LA-05 | Democrat | 29% | Republican | 68% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| LA-06 | Democrat | 40% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| LA-06 | Don Cazayoux* | 49% | Bill Cassidy | 46% | May 03 | May 03 | Special election May 2008 | |
| LA-06 | Democrat | 00% | Republican | 83% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| LA-07 | Democrat | 34% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| LA-07 | Democrat | 29% | Republican | 71% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| ME-01 | Democrat | 55% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| ME-01 | Democrat | 61% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| ME-02 | Democrat | 67% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| ME-02 | Democrat | 71% | Republican | 29% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-01 | Democrat | 50% | Republican | 49% | Nov 05 | Nov 05 | Election 2008 | |
| MD-01 | Frank Kratovil | 40% | Andy Harris* | 44% | Oct 20 | Oct 22 | Research 2000 | |
| MD-01 | Democrat | 31% | Republican | 69% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-02 | Democrat | 72% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| MD-02 | Democrat | 69% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-03 | Democrat | 70% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| MD-03 | Democrat | 64% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-04 | Democrat | 86% | Republican | 13% | Nov 05 | Nov 05 | Election 2008 | |
| MD-04 | Democrat | 81% | Republican | 19% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-05 | Democrat | 74% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| MD-05 | Democrat | 83% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-06 | Democrat | 39% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| MD-06 | Democrat | 38% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-07 | Democrat | 80% | Republican | 18% | Nov 05 | Nov 05 | Election 2008 | |
| MD-07 | Democrat | 98% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MD-08 | Democrat | 75% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| MD-08 | Democrat | 77% | Republican | 22% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-01 | Democrat | 73% | Republican | 27% | Nov 05 | Nov 05 | Election 2008 | |
| MA-01 | Democrat | 76% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-02 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MA-02 | Democrat | 99% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-03 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MA-03 | Democrat | 99% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-04 | Democrat | 68% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| MA-04 | Democrat | 98% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-05 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MA-05 | Niki Tsongas* | 51% | (unopposed) | 45% | Jan 01 | Jan 01 | Special election Oct. 2007 | |
| MA-05 | Democrat | 98% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-06 | Democrat | 70% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| MA-06 | Democrat | 70% | Republican | 30% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-07 | Democrat | 76% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| MA-07 | Democrat | 98% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-08 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MA-08 | Democrat | 91% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-09 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MA-09 | Democrat | 78% | Republican | 22% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MA-10 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MA-10 | Democrat | 64% | Republican | 29% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-01 | Democrat | 65% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| MI-01 | Democrat | 69% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-02 | Democrat | 35% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| MI-02 | Democrat | 32% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-03 | Democrat | 35% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| MI-03 | Democrat | 35% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-04 | Democrat | 36% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| MI-04 | Democrat | 38% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-05 | Democrat | 70% | Republican | 27% | Nov 05 | Nov 05 | Election 2008 | |
| MI-05 | Democrat | 73% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-06 | Democrat | 39% | Republican | 59% | Nov 05 | Nov 05 | Election 2008 | |
| MI-06 | Democrat | 38% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-07 | Democrat | 49% | Republican | 46% | Nov 05 | Nov 05 | Election 2008 | |
| MI-07 | Mark Schauer | 40% | Tim Walberg* | 43% | Aug 20 | Aug 22 | EPIC-MRA | |
| MI-07 | Mark Schauer | 51% | Tim Walberg* | 40% | Feb 27 | Mar 02 | EPIC-MRA | |
| MI-07 | Democrat | 46% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-08 | Democrat | 40% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| MI-08 | Democrat | 43% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-09 | Democrat | 52% | Republican | 43% | Nov 05 | Nov 05 | Election 2008 | |
| MI-09 | Gary Peters | 43% | Joe Knollenberg* | 43% | Sep 30 | Oct 02 | Mitchell Research | |
| MI-09 | Gary Peters | 36% | Joe Knollenberg* | 43% | Aug 21 | Aug 23 | EPIC-MRA | |
| MI-09 | Democrat | 46% | Republican | 52% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-10 | Democrat | 31% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| MI-10 | Democrat | 31% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-11 | Democrat | 45% | Republican | 51% | Nov 05 | Nov 05 | Election 2008 | |
| MI-11 | Democrat | 43% | Republican | 54% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-12 | Democrat | 72% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| MI-12 | Democrat | 70% | Republican | 26% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-13 | Democrat | 74% | Republican | 19% | Nov 05 | Nov 05 | Election 2008 | |
| MI-13 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-14 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MI-14 | Democrat | 85% | Republican | 15% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MI-15 | Democrat | 71% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| MI-15 | Democrat | 88% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-01 | Democrat | 63% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| MN-01 | Democrat | 53% | Republican | 47% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-02 | Democrat | 43% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| MN-02 | Democrat | 40% | Republican | 56% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-03 | Democrat | 41% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| MN-03 | Ashwin Madia | 41% | Erik Paulsen* | 46% | Oct 29 | Oct 30 | SurveyUSA | |
| MN-03 | Ashwin Madia | 44% | Erik Paulsen* | 45% | Oct 26 | Oct 27 | SurveyUSA | |
| MN-03 | Ashwin Madia | 46% | Erik Paulsen* | 43% | Oct 06 | Oct 07 | SurveyUSA | |
| MN-03 | Ashwin Madia | 41% | Erik Paulsen* | 44% | Aug 26 | Aug 28 | SurveyUSA | |
| MN-03 | Democrat | 35% | Republican | 65% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-04 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| MN-04 | Democrat | 70% | Republican | 30% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-05 | Democrat | 71% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| MN-05 | Democrat | 56% | Republican | 21% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-06 | Democrat | 44% | Republican | 46% | Nov 05 | Nov 05 | Election 2008 | |
| MN-06 | Elwyn Tinklenberg | 45% | Michele Bachmann* | 46% | Oct 29 | Oct 30 | SurveyUSA | |
| MN-06 | Elwyn Tinklenberg | 45% | Michele Bachmann* | 43% | Oct 21 | Oct 23 | U. of Minnesota | |
| MN-06 | Elwyn Tinklenberg | 47% | Michele Bachmann* | 44% | Oct 21 | Oct 22 | SurveyUSA | |
| MN-06 | Democrat | 42% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-07 | Democrat | 72% | Republican | 28% | Nov 05 | Nov 05 | Election 2008 | |
| MN-07 | Democrat | 70% | Republican | 29% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MN-08 | Democrat | 68% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| MN-08 | Democrat | 64% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MS-01 | Democrat | 54% | Republican | 44% | Nov 05 | Nov 05 | Election 2008 | |
| MS-01 | Travis Childers* | 54% | Greg Davis | 46% | May 13 | May 13 | Special election May 2008 | |
| MS-01 | Democrat | 34% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MS-02 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| MS-02 | Democrat | 64% | Republican | 36% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MS-03 | Democrat | 37% | Republican | 63% | Nov 05 | Nov 05 | Election 2008 | |
| MS-03 | Democrat | 00% | Republican | 78% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MS-04 | Democrat | 75% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| MS-04 | Democrat | 80% | Republican | 20% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-01 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| MO-01 | Democrat | 73% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-02 | Democrat | 36% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| MO-02 | Democrat | 37% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-03 | Democrat | 66% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| MO-03 | Democrat | 66% | Republican | 32% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-04 | Democrat | 66% | Republican | 34% | Nov 05 | Nov 05 | Election 2008 | |
| MO-04 | Democrat | 68% | Republican | 29% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-05 | Democrat | 64% | Republican | 36% | Nov 05 | Nov 05 | Election 2008 | |
| MO-05 | Democrat | 64% | Republican | 32% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-06 | Democrat | 37% | Republican | 59% | Nov 05 | Nov 05 | Election 2008 | |
| MO-06 | Kay Barnes | 36% | Sam Graves* | 54% | Oct 27 | Oct 28 | SurveyUSA | |
| MO-06 | Kay Barnes | 40% | Sam Graves* | 51% | Oct 13 | Oct 14 | SurveyUSA | |
| MO-06 | Kay Barnes | 42% | Sam Graves* | 51% | Sep 17 | Sep 18 | SurveyUSA | |
| MO-06 | Kay Barnes | 44% | Sam Graves* | 48% | Jul 30 | Jul 31 | SurveyUSA | |
| MO-06 | Kay Barnes | 39% | Sam Graves* | 49% | May 16 | May 18 | SurveyUSA | |
| MO-06 | Democrat | 36% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-07 | Democrat | 28% | Republican | 68% | Nov 05 | Nov 05 | Election 2008 | |
| MO-07 | Democrat | 30% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-08 | Democrat | 26% | Republican | 71% | Nov 05 | Nov 05 | Election 2008 | |
| MO-08 | Democrat | 26% | Republican | 72% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MO-09 | Democrat | 47% | Republican | 50% | Nov 05 | Nov 05 | Election 2008 | |
| MO-09 | Judy Baker | 47% | Blaine Luetkemeyer* | 42% | Oct 20 | Oct 22 | Research 2000 | |
| MO-09 | Judy Baker | 40% | Blaine Luetkemeyer* | 49% | Sep 16 | Sep 18 | Research 2000 | |
| MO-09 | Judy Baker | 38% | Blaine Luetkemeyer* | 50% | Sep 01 | Sep 02 | SurveyUSA | |
| MO-09 | Democrat | 36% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| MT-AL | Democrat | 32% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| MT-AL | John Driscoll | 39% | Denny Rehberg* | 55% | Oct 28 | Oct 30 | Research 2000 | |
| MT-AL | John Driscoll | 38% | Denny Rehberg* | 52% | Oct 15 | Oct 16 | Research 2000 | |
| MT-AL | John Driscoll | 20% | Denny Rehberg* | 52% | May 19 | May 21 | Mason-Dixon | |
| MT-AL | Democrat | 39% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NE-01 | Democrat | 30% | Republican | 70% | Nov 05 | Nov 05 | Election 2008 | |
| NE-01 | Democrat | 42% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NE-02 | Democrat | 48% | Republican | 52% | Nov 05 | Nov 05 | Election 2008 | |
| NE-02 | Jim Esch | 39% | Lee Terry* | 49% | Oct 06 | Oct 08 | Research 2000 | |
| NE-02 | Democrat | 45% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NE-03 | Democrat | 23% | Republican | 77% | Nov 05 | Nov 05 | Election 2008 | |
| NE-03 | Democrat | 45% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NV-01 | Democrat | 68% | Republican | 28% | Nov 05 | Nov 05 | Election 2008 | |
| NV-01 | Democrat | 65% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NV-02 | Democrat | 41% | Republican | 52% | Nov 05 | Nov 05 | Election 2008 | |
| NV-02 | Jill Derby | 37% | Dean Heller* | 50% | Oct 28 | Oct 29 | Mason-Dixon | |
| NV-02 | Jill Derby | 38% | Dean Heller* | 51% | Oct 08 | Oct 09 | Mason-Dixon | |
| NV-02 | Jill Derby | 41% | Dean Heller* | 48% | Oct 03 | Oct 06 | Research 2000 | |
| NV-02 | Jill Derby | 42% | Dean Heller* | 47% | Aug 18 | Aug 20 | Research 2000 | |
| NV-02 | Jill Derby | 39% | Dean Heller* | 53% | Jun 09 | Jun 11 | Mason-Dixon | |
| NV-02 | Democrat | 45% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NV-03 | Democrat | 48% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| NV-03 | Dina Titus | 44% | Jon Porter* | 44% | Oct 28 | Oct 29 | Mason-Dixon | |
| NV-03 | Dina Titus | 47% | Jon Porter* | 45% | Oct 20 | Oct 22 | Research 2000 | |
| NV-03 | Dina Titus | 37% | Jon Porter* | 46% | Oct 08 | Oct 09 | Mason-Dixon | |
| NV-03 | Dina Titus | 42% | Jon Porter* | 45% | Jun 09 | Jun 11 | Mason-Dixon | |
| NV-03 | Democrat | 47% | Republican | 48% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NH-01 | Democrat | 52% | Republican | 46% | Nov 05 | Nov 05 | Election 2008 | |
| NH-01 | Carol Shea-Porter* | 44% | Jeb Bradley | 41% | Oct 29 | Oct 30 | SurveyUSA | |
| NH-01 | Carol Shea-Porter* | 44% | Jeb Bradley | 41% | Oct 27 | Oct 29 | U. of New Hampshire | |
| NH-01 | Carol Shea-Porter* | 48% | Jeb Bradley | 40% | Oct 24 | Oct 26 | U. of New Hampshire | |
| NH-01 | Carol Shea-Porter* | 44% | Jeb Bradley | 39% | Oct 18 | Oct 22 | U. of New Hampshire | |
| NH-01 | Carol Shea-Porter* | 50% | Jeb Bradley | 41% | Oct 04 | Oct 05 | SurveyUSA | |
| NH-01 | Carol Shea-Porter* | 44% | Jeb Bradley | 43% | Sep 22 | Sep 24 | Research 2000 | |
| NH-01 | Carol Shea-Porter* | 42% | Jeb Bradley | 45% | Sep 14 | Sep 21 | U. of New Hampshire | |
| NH-01 | Democrat | 51% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NH-02 | Democrat | 57% | Republican | 41% | Nov 05 | Nov 05 | Election 2008 | |
| NH-02 | Paul Hodes* | 54% | Jennifer Horn | 26% | Oct 29 | Oct 30 | SurveyUSA | |
| NH-02 | Paul Hodes* | 48% | Jennifer Horn | 26% | Oct 24 | Oct 26 | U. of New Hampshire | |
| NH-02 | Paul Hodes* | 47% | Jennifer Horn | 34% | Sep 22 | Sep 24 | Research 2000 | |
| NH-02 | Paul Hodes* | 38% | Jennifer Horn | 26% | Sep 14 | Sep 21 | U. of New Hampshire | |
| NH-02 | Paul Hodes* | 44% | Jennifer Horn | 25% | Jul 11 | Jul 20 | U. of New Hampshire | |
| NH-02 | Democrat | 53% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-01 | Democrat | 72% | Republican | 26% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-01 | Camille Andrews* | 73% | Dale Glading | 16% | Sep 18 | Sep 20 | Zogby | |
| NJ-01 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-02 | Democrat | 39% | Republican | 59% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-02 | David Kurkowski | 26% | Frank LoBiondo* | 62% | Sep 18 | Sep 20 | Zogby | |
| NJ-02 | Democrat | 36% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-03 | Democrat | 52% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-03 | John Adler | 41% | Chris Myers* | 44% | Sep 30 | Oct 02 | Monmouth U. | |
| NJ-03 | John Adler | 37% | Chris Myers* | 39% | Sep 18 | Sep 20 | Zogby | |
| NJ-03 | Democrat | 41% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-04 | Democrat | 33% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-04 | Democrat | 33% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-05 | Democrat | 42% | Republican | 56% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-05 | Dennis Shulman | 40% | Scott Garrett* | 47% | Oct 20 | Oct 22 | Research 2000 | |
| NJ-05 | Dennis Shulman | 34% | Scott Garrett* | 49% | Sep 17 | Sep 18 | Research 2000 | |
| NJ-05 | Democrat | 44% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-06 | Democrat | 67% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-06 | Democrat | 69% | Republican | 30% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-07 | Democrat | 41% | Republican | 51% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-07 | Linda Stender | 39% | Leonard Lance* | 43% | Sep 30 | Oct 02 | Monmouth U. | |
| NJ-07 | Democrat | 48% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-08 | Democrat | 71% | Republican | 28% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-08 | Democrat | 71% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-09 | Democrat | 68% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-09 | Democrat | 71% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-10 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-10 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-11 | Democrat | 37% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-11 | Democrat | 37% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-12 | Democrat | 62% | Republican | 36% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-12 | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NJ-13 | Democrat | 75% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| NJ-13 | Democrat | 78% | Republican | 19% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NM-01 | Democrat | 55% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| NM-01 | Martin Heinrich | 47% | Darren White* | 43% | Oct 28 | Oct 30 | Research and Polling | |
| NM-01 | Martin Heinrich | 43% | Darren White* | 41% | Sep 29 | Oct 02 | Research and Polling | |
| NM-01 | Martin Heinrich | 51% | Darren White* | 46% | Aug 26 | Aug 28 | SurveyUSA | |
| NM-01 | Democrat | 49% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NM-02 | Democrat | 56% | Republican | 44% | Nov 05 | Nov 05 | Election 2008 | |
| NM-02 | Harry Teague | 45% | Edward Tinsley* | 41% | Oct 28 | Oct 30 | Research and Polling | |
| NM-02 | Harry Teague | 47% | Edward Tinsley* | 43% | Sep 30 | Oct 01 | Research 2000 | |
| NM-02 | Democrat | 40% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NM-03 | Democrat | 56% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| NM-03 | Ben Lujan* | 51% | Daniel East | 23% | Oct 28 | Oct 30 | Research and Polling | |
| NM-03 | Democrat | 75% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-01 | Democrat | 58% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| NY-01 | Democrat | 55% | Republican | 32% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-02 | Democrat | 66% | Republican | 34% | Nov 05 | Nov 05 | Election 2008 | |
| NY-02 | Democrat | 63% | Republican | 25% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-03 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| NY-03 | Democrat | 42% | Republican | 48% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-04 | Democrat | 64% | Republican | 36% | Nov 05 | Nov 05 | Election 2008 | |
| NY-04 | Democrat | 59% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-05 | Democrat | 70% | Republican | 28% | Nov 05 | Nov 05 | Election 2008 | |
| NY-05 | Democrat | 91% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-06 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| NY-06 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-07 | Democrat | 85% | Republican | 15% | Nov 05 | Nov 05 | Election 2008 | |
| NY-07 | Democrat | 79% | Republican | 14% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-08 | Democrat | 80% | Republican | 20% | Nov 05 | Nov 05 | Election 2008 | |
| NY-08 | Democrat | 75% | Republican | 14% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-09 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| NY-09 | Democrat | 93% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-10 | Democrat | 94% | Republican | 06% | Nov 05 | Nov 05 | Election 2008 | |
| NY-10 | Democrat | 92% | Republican | 06% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-11 | Democrat | 92% | Republican | 07% | Nov 05 | Nov 05 | Election 2008 | |
| NY-11 | Democrat | 77% | Republican | 07% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-12 | Democrat | 89% | Republican | 11% | Nov 05 | Nov 05 | Election 2008 | |
| NY-12 | Democrat | 80% | Republican | 09% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-13 | Democrat | 61% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| NY-13 | Democrat | 40% | Republican | 48% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-14 | Democrat | 79% | Republican | 19% | Nov 05 | Nov 05 | Election 2008 | |
| NY-14 | Democrat | 76% | Republican | 16% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-15 | Democrat | 88% | Republican | 09% | Nov 05 | Nov 05 | Election 2008 | |
| NY-15 | Democrat | 85% | Republican | 06% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-16 | Democrat | 97% | Republican | 03% | Nov 05 | Nov 05 | Election 2008 | |
| NY-16 | Democrat | 90% | Republican | 03% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-17 | Democrat | 79% | Republican | 21% | Nov 05 | Nov 05 | Election 2008 | |
| NY-17 | Democrat | 76% | Republican | 24% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-18 | Democrat | 68% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| NY-18 | Democrat | 68% | Republican | 03% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-19 | Democrat | 58% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| NY-19 | Democrat | 51% | Republican | 41% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-20 | Democrat | 62% | Republican | 38% | Nov 05 | Nov 05 | Election 2008 | |
| NY-20 | Democrat | 49% | Republican | 40% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-21 | Democrat | 62% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| NY-21 | Democrat | 65% | Republican | 22% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-22 | Democrat | 66% | Republican | 34% | Nov 05 | Nov 05 | Election 2008 | |
| NY-22 | Democrat | 86% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-23 | Democrat | 35% | Republican | 65% | Nov 05 | Nov 05 | Election 2008 | |
| NY-23 | Democrat | 35% | Republican | 53% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-24 | Democrat | 51% | Republican | 49% | Nov 05 | Nov 05 | Election 2008 | |
| NY-24 | Democrat | 54% | Republican | 45% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-25 | Democrat | 55% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| NY-25 | Democrat | 49% | Republican | 51% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-26 | Democrat | 40% | Republican | 55% | Nov 05 | Nov 05 | Election 2008 | |
| NY-26 | Alice Kryzan | 34% | Christopher Lee* | 48% | Oct 28 | Oct 29 | SurveyUSA | |
| NY-26 | Alice Kryzan | 37% | Christopher Lee* | 48% | Sep 24 | Sep 25 | SurveyUSA | |
| NY-26 | Democrat | 41% | Republican | 45% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-27 | Democrat | 74% | Republican | 23% | Nov 05 | Nov 05 | Election 2008 | |
| NY-27 | Democrat | 66% | Republican | 21% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-28 | Democrat | 78% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| NY-28 | Democrat | 63% | Republican | 23% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NY-29 | Democrat | 51% | Republican | 49% | Nov 05 | Nov 05 | Election 2008 | |
| NY-29 | Eric Massa | 49% | Randy Kuhl* | 42% | Oct 07 | Oct 08 | Research 2000 | |
| NY-29 | Eric Massa | 51% | Randy Kuhl* | 44% | Oct 04 | Oct 05 | SurveyUSA | |
| NY-29 | Democrat | 48% | Republican | 52% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-01 | Democrat | 70% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| NC-01 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-02 | Democrat | 67% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| NC-02 | Democrat | 67% | Republican | 33% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-03 | Democrat | 34% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| NC-03 | Democrat | 31% | Republican | 69% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-04 | Democrat | 63% | Republican | 37% | Nov 05 | Nov 05 | Election 2008 | |
| NC-04 | Democrat | 65% | Republican | 35% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-05 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| NC-05 | Democrat | 43% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-06 | Democrat | 33% | Republican | 67% | Nov 05 | Nov 05 | Election 2008 | |
| NC-06 | Democrat | 29% | Republican | 71% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-07 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| NC-07 | Democrat | 73% | Republican | 27% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-08 | Democrat | 55% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| NC-08 | Larry Kissel | 49% | Robin Hayes* | 41% | Oct 04 | Oct 05 | SurveyUSA | |
| NC-08 | Democrat | 49% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-09 | Democrat | 36% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| NC-09 | Democrat | 33% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-10 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| NC-10 | Daniel Johnson | 37% | Patrick McHenry* | 52% | Oct 20 | Oct 22 | Research 2000 | |
| NC-10 | Democrat | 38% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-11 | Democrat | 62% | Republican | 36% | Nov 05 | Nov 05 | Election 2008 | |
| NC-11 | Democrat | 54% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-12 | Democrat | 72% | Republican | 28% | Nov 05 | Nov 05 | Election 2008 | |
| NC-12 | Democrat | 67% | Republican | 33% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| NC-13 | Democrat | 66% | Republican | 34% | Nov 05 | Nov 05 | Election 2008 | |
| NC-13 | Democrat | 64% | Republican | 36% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| ND-AL | Democrat | 62% | Republican | 38% | Nov 05 | Nov 05 | Election 2008 | |
| ND-AL | Earl Pomeroy* | 60% | Duane Sand | 27% | Oct 06 | Oct 08 | Minnesota State U. | |
| ND-AL | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-01 | Democrat | 51% | Republican | 49% | Nov 05 | Nov 05 | Election 2008 | |
| OH-01 | Steve Driehaus | 46% | Steve Chabot* | 44% | Sep 30 | Oct 01 | Research 2000 | |
| OH-01 | Democrat | 48% | Republican | 52% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-02 | Democrat | 37% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| OH-02 | Victoria Wulsin | 39% | Jean Schmidt* | 46% | Sep 30 | Oct 01 | Research 2000 | |
| OH-02 | Victoria Wulsin | 30% | Jean Schmidt* | 24% | May 31 | Jun 02 | American Political Polling | |
| OH-02 | Democrat | 49% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-03 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| OH-03 | Democrat | 41% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-04 | Democrat | 35% | Republican | 65% | Nov 05 | Nov 05 | Election 2008 | |
| OH-04 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-05 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| OH-05 | George Mays | 36% | Bob Latta* | 50% | Jan 01 | Jan 01 | Special election Dec. 2007 | |
| OH-05 | Democrat | 43% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-06 | Democrat | 62% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| OH-06 | Democrat | 62% | Republican | 38% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-07 | Democrat | 42% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| OH-07 | Democrat | 39% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-08 | Democrat | 32% | Republican | 68% | Nov 05 | Nov 05 | Election 2008 | |
| OH-08 | Democrat | 36% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-09 | Democrat | 74% | Republican | 26% | Nov 05 | Nov 05 | Election 2008 | |
| OH-09 | Democrat | 74% | Republican | 26% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-10 | Democrat | 57% | Republican | 39% | Nov 05 | Nov 05 | Election 2008 | |
| OH-10 | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-11 | Democrat | 85% | Republican | 15% | Nov 05 | Nov 05 | Election 2008 | |
| OH-11 | Democrat | 83% | Republican | 17% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-12 | Democrat | 42% | Republican | 55% | Nov 05 | Nov 05 | Election 2008 | |
| OH-12 | Democrat | 43% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-13 | Democrat | 65% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| OH-13 | Democrat | 61% | Republican | 39% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-14 | Democrat | 39% | Republican | 58% | Nov 05 | Nov 05 | Election 2008 | |
| OH-14 | Democrat | 39% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-15 | Democrat | 46% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| OH-15 | Mary Jo Kilroy | 47% | Steve Stivers* | 41% | Oct 25 | Oct 26 | SurveyUSA | |
| OH-15 | Mary Jo Kilroy | 47% | Steve Stivers* | 44% | Aug 02 | Aug 04 | SurveyUSA | |
| OH-15 | Democrat | 49% | Republican | 50% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-16 | Democrat | 54% | Republican | 46% | Nov 05 | Nov 05 | Election 2008 | |
| OH-16 | John Boccieri | 48% | Kirk Schuring* | 38% | Sep 30 | Oct 01 | Research 2000 | |
| OH-16 | Democrat | 42% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-17 | Democrat | 78% | Republican | 22% | Nov 05 | Nov 05 | Election 2008 | |
| OH-17 | Democrat | 80% | Republican | 20% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OH-18 | Democrat | 60% | Republican | 40% | Nov 05 | Nov 05 | Election 2008 | |
| OH-18 | Democrat | 62% | Republican | 38% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OK-01 | Democrat | 34% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| OK-01 | Democrat | 31% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OK-02 | Democrat | 70% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| OK-02 | Democrat | 73% | Republican | 27% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OK-03 | Democrat | 23% | Republican | 70% | Nov 05 | Nov 05 | Election 2008 | |
| OK-03 | Democrat | 33% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OK-04 | Democrat | 29% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| OK-04 | Democrat | 35% | Republican | 65% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OK-05 | Democrat | 34% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| OK-05 | Democrat | 37% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OR-01 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| OR-01 | Democrat | 63% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OR-02 | Democrat | 26% | Republican | 70% | Nov 05 | Nov 05 | Election 2008 | |
| OR-02 | Democrat | 30% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OR-03 | Democrat | 75% | Republican | 21% | Nov 05 | Nov 05 | Election 2008 | |
| OR-03 | Democrat | 73% | Republican | 23% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OR-04 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| OR-04 | Democrat | 62% | Republican | 38% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| OR-05 | Democrat | 55% | Republican | 38% | Nov 05 | Nov 05 | Election 2008 | |
| OR-05 | Kurt Schrader* | 55% | Mike Erickson | 31% | Oct 27 | Oct 28 | SurveyUSA | |
| OR-05 | Kurt Schrader* | 51% | Mike Erickson | 38% | Oct 13 | Oct 14 | SurveyUSA | |
| OR-05 | Democrat | 54% | Republican | 43% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-01 | Democrat | 91% | Republican | 09% | Nov 05 | Nov 05 | Election 2008 | |
| PA-01 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-02 | Democrat | 89% | Republican | 11% | Nov 05 | Nov 05 | Election 2008 | |
| PA-02 | Democrat | 89% | Republican | 09% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-03 | Democrat | 52% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| PA-03 | Kathleen Dahlkemper | 48% | Phil English* | 41% | Oct 06 | Oct 08 | Research 2000 | |
| PA-03 | Kathleen Dahlkemper | 49% | Phil English* | 45% | Sep 26 | Sep 28 | SurveyUSA | |
| PA-03 | Democrat | 42% | Republican | 54% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-04 | Democrat | 56% | Republican | 44% | Nov 05 | Nov 05 | Election 2008 | |
| PA-04 | Jason Altmire* | 53% | Melissa Hart | 35% | Oct 20 | Oct 20 | Susquehanna Polling | |
| PA-04 | Jason Altmire* | 54% | Melissa Hart | 42% | Oct 04 | Oct 05 | SurveyUSA | |
| PA-04 | Democrat | 52% | Republican | 48% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-05 | Democrat | 41% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| PA-05 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-06 | Democrat | 48% | Republican | 52% | Nov 05 | Nov 05 | Election 2008 | |
| PA-06 | Democrat | 49% | Republican | 51% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-07 | Democrat | 60% | Republican | 40% | Nov 05 | Nov 05 | Election 2008 | |
| PA-07 | Democrat | 56% | Republican | 44% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-08 | Democrat | 57% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| PA-08 | Democrat | 50% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-09 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| PA-09 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-10 | Democrat | 56% | Republican | 44% | Nov 05 | Nov 05 | Election 2008 | |
| PA-10 | Chris Carney* | 48% | Christopher Hackett | 33% | Sep 30 | Oct 05 | Franklin+Marshall Coll. | |
| PA-10 | Chris Carney* | 46% | Christopher Hackett | 36% | Sep 21 | Sep 25 | Lycoming Coll. | |
| PA-10 | Chris Carney* | 49% | Christopher Hackett | 45% | Aug 23 | Aug 25 | SurveyUSA | |
| PA-10 | Democrat | 53% | Republican | 47% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-11 | Democrat | 52% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| PA-11 | Paul Kanjorski* | 35% | Louis Barletta | 40% | Oct 08 | Oct 12 | Franklin+Marshall Coll. | |
| PA-11 | Paul Kanjorski* | 39% | Louis Barletta | 43% | Oct 06 | Oct 08 | Research 2000 | |
| PA-11 | Paul Kanjorski* | 35% | Louis Barletta | 44% | Sep 09 | Sep 14 | Franklin+Marshall Coll. | |
| PA-11 | Democrat | 72% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-12 | Democrat | 58% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| PA-12 | John Murtha* | 46% | William Russell | 44% | Oct 28 | Oct 28 | Dane | |
| PA-12 | Democrat | 61% | Republican | 39% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-13 | Democrat | 63% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| PA-13 | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-14 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| PA-14 | Democrat | 90% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-15 | Democrat | 41% | Republican | 59% | Nov 05 | Nov 05 | Election 2008 | |
| PA-15 | Democrat | 43% | Republican | 54% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-16 | Democrat | 39% | Republican | 56% | Nov 05 | Nov 05 | Election 2008 | |
| PA-16 | Democrat | 40% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-17 | Democrat | 64% | Republican | 36% | Nov 05 | Nov 05 | Election 2008 | |
| PA-17 | Democrat | 65% | Republican | 35% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-18 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| PA-18 | Democrat | 42% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| PA-19 | Democrat | 33% | Republican | 67% | Nov 05 | Nov 05 | Election 2008 | |
| PA-19 | Democrat | 33% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| RI-01 | Democrat | 69% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| RI-01 | Democrat | 69% | Republican | 23% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| RI-02 | Democrat | 70% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| RI-02 | Democrat | 73% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| SC-01 | Democrat | 48% | Republican | 52% | Nov 05 | Nov 05 | Election 2008 | |
| SC-01 | Linda Ketner | 45% | Henry Brown, Jr.* | 50% | Oct 25 | Oct 26 | SurveyUSA | |
| SC-01 | Linda Ketner | 37% | Henry Brown, Jr.* | 48% | Oct 20 | Oct 22 | Research 2000 | |
| SC-01 | Democrat | 35% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| SC-02 | Democrat | 46% | Republican | 54% | Nov 05 | Nov 05 | Election 2008 | |
| SC-02 | Rob Miller | 35% | Joe Wilson* | 47% | Oct 20 | Oct 22 | Research 2000 | |
| SC-02 | Democrat | 37% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| SC-03 | Democrat | 35% | Republican | 65% | Nov 05 | Nov 05 | Election 2008 | |
| SC-03 | Democrat | 34% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| SC-04 | Democrat | 37% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| SC-04 | Democrat | 32% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| SC-05 | Democrat | 62% | Republican | 37% | Nov 05 | Nov 05 | Election 2008 | |
| SC-05 | Democrat | 57% | Republican | 43% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| SC-06 | Democrat | 68% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| SC-06 | Democrat | 64% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| SD-AL | Democrat | 68% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| SD-AL | Stephanie Herseth* | 67% | Chris Lien | 22% | Oct 13 | Oct 15 | Mason-Dixon | |
| SD-AL | Democrat | 69% | Republican | 29% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-01 | Democrat | 24% | Republican | 72% | Nov 05 | Nov 05 | Election 2008 | |
| TN-01 | Democrat | 37% | Republican | 61% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-02 | Democrat | 22% | Republican | 78% | Nov 05 | Nov 05 | Election 2008 | |
| TN-02 | Democrat | 22% | Republican | 78% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-03 | Democrat | 28% | Republican | 69% | Nov 05 | Nov 05 | Election 2008 | |
| TN-03 | Democrat | 34% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-04 | Democrat | 59% | Republican | 38% | Nov 05 | Nov 05 | Election 2008 | |
| TN-04 | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-05 | Democrat | 66% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| TN-05 | Democrat | 69% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-06 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| TN-06 | Democrat | 67% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-07 | Democrat | 31% | Republican | 69% | Nov 05 | Nov 05 | Election 2008 | |
| TN-07 | Democrat | 32% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-08 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| TN-08 | Democrat | 73% | Republican | 27% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TN-09 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| TN-09 | Democrat | 60% | Republican | 18% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-01 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| TX-01 | Democrat | 30% | Republican | 68% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-02 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| TX-02 | Democrat | 33% | Republican | 66% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-03 | Democrat | 38% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| TX-03 | Democrat | 35% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-04 | Democrat | 29% | Republican | 69% | Nov 05 | Nov 05 | Election 2008 | |
| TX-04 | Democrat | 33% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-05 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| TX-05 | Democrat | 36% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-06 | Democrat | 36% | Republican | 62% | Nov 05 | Nov 05 | Election 2008 | |
| TX-06 | Democrat | 37% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-07 | Democrat | 42% | Republican | 56% | Nov 05 | Nov 05 | Election 2008 | |
| TX-07 | Michael Skelly | 41% | John Culberson* | 48% | Oct 20 | Oct 22 | Zogby | |
| TX-07 | Michael Skelly | 40% | John Culberson* | 48% | Oct 07 | Oct 08 | Research 2000 | |
| TX-07 | Michael Skelly | 39% | John Culberson* | 57% | Apr 08 | Apr 08 | IVR Polls | |
| TX-07 | Democrat | 38% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-08 | Democrat | 25% | Republican | 72% | Nov 05 | Nov 05 | Election 2008 | |
| TX-08 | Democrat | 33% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-09 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| TX-09 | Democrat | 100% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-10 | Democrat | 43% | Republican | 54% | Nov 05 | Nov 05 | Election 2008 | |
| TX-10 | Larry Doherty | 42% | Michael McCaul* | 46% | Oct 20 | Oct 22 | Research 2000 | |
| TX-10 | Larry Doherty | 46% | Michael McCaul* | 52% | Jun 02 | Jun 02 | IVR Polls | |
| TX-10 | Democrat | 40% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-11 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| TX-11 | Democrat | 00% | Republican | 100% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-12 | Democrat | 31% | Republican | 67% | Nov 05 | Nov 05 | Election 2008 | |
| TX-12 | Democrat | 31% | Republican | 67% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-13 | Democrat | 22% | Republican | 78% | Nov 05 | Nov 05 | Election 2008 | |
| TX-13 | Democrat | 23% | Republican | 74% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-14 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| TX-14 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-15 | Democrat | 66% | Republican | 32% | Nov 05 | Nov 05 | Election 2008 | |
| TX-15 | Democrat | 62% | Republican | 24% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-16 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| TX-16 | Democrat | 79% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-17 | Democrat | 53% | Republican | 45% | Nov 05 | Nov 05 | Election 2008 | |
| TX-17 | Democrat | 58% | Republican | 40% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-18 | Democrat | 77% | Republican | 21% | Nov 05 | Nov 05 | Election 2008 | |
| TX-18 | Democrat | 77% | Republican | 19% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-19 | Democrat | 25% | Republican | 72% | Nov 05 | Nov 05 | Election 2008 | |
| TX-19 | Democrat | 30% | Republican | 68% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-20 | Democrat | 72% | Republican | 25% | Nov 05 | Nov 05 | Election 2008 | |
| TX-20 | Democrat | 87% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-21 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| TX-21 | Democrat | 25% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-22 | Democrat | 45% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| TX-22 | Nick Lampson* | 36% | Peter Olson | 53% | Oct 20 | Oct 22 | Zogby | |
| TX-22 | Democrat | 52% | Republican | 42% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-23 | Democrat | 56% | Republican | 42% | Nov 05 | Nov 05 | Election 2008 | |
| TX-23 | Democrat | 54% | Republican | 46% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-24 | Democrat | 41% | Republican | 56% | Nov 05 | Nov 05 | Election 2008 | |
| TX-24 | Democrat | 37% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-25 | Democrat | 66% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| TX-25 | Democrat | 67% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-26 | Democrat | 37% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| TX-26 | Democrat | 37% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-27 | Democrat | 58% | Republican | 38% | Nov 05 | Nov 05 | Election 2008 | |
| TX-27 | Democrat | 57% | Republican | 39% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-28 | Democrat | 69% | Republican | 29% | Nov 05 | Nov 05 | Election 2008 | |
| TX-28 | Democrat | 68% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-29 | Democrat | 75% | Republican | 24% | Nov 05 | Nov 05 | Election 2008 | |
| TX-29 | Democrat | 74% | Republican | 24% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-30 | Democrat | 82% | Republican | 16% | Nov 05 | Nov 05 | Election 2008 | |
| TX-30 | Democrat | 80% | Republican | 18% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-31 | Democrat | 37% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| TX-31 | Democrat | 39% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| TX-32 | Democrat | 41% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| TX-32 | Democrat | 41% | Republican | 56% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| UT-01 | Democrat | 31% | Republican | 65% | Nov 05 | Nov 05 | Election 2008 | |
| UT-01 | Morgan Boweb | 21% | Rob Bishop* | 62% | Sep 08 | Sep 11 | Dan Jones | |
| UT-01 | Democrat | 32% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| UT-02 | Democrat | 63% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| UT-02 | Jim Matheson* | 62% | Bill Dew | 27% | Sep 08 | Sep 11 | Dan Jones | |
| UT-02 | Democrat | 59% | Republican | 37% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| UT-03 | Democrat | 28% | Republican | 66% | Nov 05 | Nov 05 | Election 2008 | |
| UT-03 | Bennion Spencer | 18% | Jason Chaffetz* | 60% | Sep 08 | Sep 11 | Dan Jones | |
| UT-03 | Democrat | 32% | Republican | 58% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VT-AL | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| VT-AL | Democrat | 53% | Republican | 45% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-01 | Democrat | 42% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| VA-01 | Democrat | 35% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| VA-01 | Keith Hummel | 37% | Rob Wittman* | 61% | Jan 01 | Jan 01 | Special election Dec. 2007 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-02 | Democrat | 52% | Republican | 48% | Nov 05 | Nov 05 | Election 2008 | |
| VA-02 | Glenn Nye | 37% | Thelma Drake* | 51% | Oct 07 | Oct 08 | Research 2000 | |
| VA-02 | Democrat | 48% | Republican | 51% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-03 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| VA-03 | Democrat | 96% | Republican | 00% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-04 | Democrat | 40% | Republican | 60% | Nov 05 | Nov 05 | Election 2008 | |
| VA-04 | Democrat | 00% | Republican | 76% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-05 | Democrat | 50% | Republican | 49% | Nov 05 | Nov 05 | Election 2008 | |
| VA-05 | Tom Perriello | 42% | Virgil Goode* | 55% | Oct 06 | Oct 07 | SurveyUSA | |
| VA-05 | Tom Perriello | 30% | Virgil Goode* | 64% | Aug 10 | Aug 12 | SurveyUSA | |
| VA-05 | Democrat | 40% | Republican | 59% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-06 | Democrat | 37% | Republican | 61% | Nov 05 | Nov 05 | Election 2008 | |
| VA-06 | Sam Rasoul | 30% | Bob Goodlatte* | 59% | Aug 11 | Aug 13 | SurveyUSA | |
| VA-06 | Democrat | 00% | Republican | 75% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-07 | Democrat | 37% | Republican | 63% | Nov 05 | Nov 05 | Election 2008 | |
| VA-07 | Democrat | 34% | Republican | 64% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-08 | Democrat | 68% | Republican | 30% | Nov 05 | Nov 05 | Election 2008 | |
| VA-08 | Democrat | 66% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-09 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| VA-09 | Democrat | 68% | Republican | 32% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-10 | Democrat | 39% | Republican | 59% | Nov 05 | Nov 05 | Election 2008 | |
| VA-10 | Democrat | 41% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| VA-11 | Democrat | 55% | Republican | 43% | Nov 05 | Nov 05 | Election 2008 | |
| VA-11 | Democrat | 44% | Republican | 55% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-01 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| WA-01 | Democrat | 68% | Republican | 32% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-02 | Democrat | 63% | Republican | 37% | Nov 05 | Nov 05 | Election 2008 | |
| WA-02 | Rick Larsen* | 58% | Rick Bart | 37% | Jul 27 | Jul 29 | SurveyUSA | |
| WA-02 | Rick Larsen* | 56% | Rick Bart | 38% | Jun 16 | Jun 17 | SurveyUSA | |
| WA-02 | Democrat | 64% | Republican | 36% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-03 | Democrat | 64% | Republican | 36% | Nov 05 | Nov 05 | Election 2008 | |
| WA-03 | Democrat | 63% | Republican | 37% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-04 | Democrat | 37% | Republican | 63% | Nov 05 | Nov 05 | Election 2008 | |
| WA-04 | Democrat | 40% | Republican | 60% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-05 | Democrat | 35% | Republican | 65% | Nov 05 | Nov 05 | Election 2008 | |
| WA-05 | Democrat | 44% | Republican | 56% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-06 | Democrat | 67% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| WA-06 | Democrat | 71% | Republican | 29% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-07 | Democrat | 84% | Republican | 16% | Nov 05 | Nov 05 | Election 2008 | |
| WA-07 | Democrat | 79% | Republican | 16% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-08 | Democrat | 49% | Republican | 50% | Nov 05 | Nov 05 | Election 2008 | |
| WA-08 | Darcy Burner | 46% | Dave Reichert* | 46% | Oct 21 | Oct 23 | Research 2000 | |
| WA-08 | Darcy Burner | 50% | Dave Reichert* | 46% | Oct 20 | Oct 21 | SurveyUSA | |
| WA-08 | Darcy Burner | 41% | Dave Reichert* | 49% | Oct 05 | Oct 07 | Research 2000 | |
| WA-08 | Darcy Burner | 44% | Dave Reichert* | 54% | Sep 07 | Sep 09 | SurveyUSA | |
| WA-08 | Darcy Burner | 44% | Dave Reichert* | 50% | Jul 27 | Jul 29 | SurveyUSA | |
| WA-08 | Darcy Burner | 45% | Dave Reichert* | 51% | Jun 16 | Jun 17 | SurveyUSA | |
| WA-08 | Democrat | 49% | Republican | 51% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WA-09 | Democrat | 66% | Republican | 34% | Nov 05 | Nov 05 | Election 2008 | |
| WA-09 | Democrat | 66% | Republican | 34% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WV-01 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| WV-01 | Democrat | 64% | Republican | 36% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WV-02 | Democrat | 43% | Republican | 57% | Nov 05 | Nov 05 | Election 2008 | |
| WV-02 | Anne Barth | 39% | Shelley Moore-Capito* | 53% | Oct 07 | Oct 08 | Research 2000 | |
| WV-02 | Democrat | 43% | Republican | 57% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WV-03 | Democrat | 67% | Republican | 33% | Nov 05 | Nov 05 | Election 2008 | |
| WV-03 | Democrat | 69% | Republican | 31% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-01 | Democrat | 35% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| WI-01 | Democrat | 37% | Republican | 63% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-02 | Democrat | 69% | Republican | 31% | Nov 05 | Nov 05 | Election 2008 | |
| WI-02 | Democrat | 63% | Republican | 37% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-03 | Democrat | 63% | Republican | 35% | Nov 05 | Nov 05 | Election 2008 | |
| WI-03 | Democrat | 65% | Republican | 35% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-04 | Democrat | 100% | Republican | 0% | Nov 05 | Nov 05 | Election 2008 | |
| WI-04 | Democrat | 71% | Republican | 28% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-05 | Democrat | 0% | Republican | 100% | Nov 05 | Nov 05 | Election 2008 | |
| WI-05 | Democrat | 36% | Republican | 62% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-06 | Democrat | 36% | Republican | 64% | Nov 05 | Nov 05 | Election 2008 | |
| WI-06 | Democrat | 00% | Republican | 99% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-07 | Democrat | 61% | Republican | 39% | Nov 05 | Nov 05 | Election 2008 | |
| WI-07 | Democrat | 62% | Republican | 35% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WI-08 | Democrat | 54% | Republican | 46% | Nov 05 | Nov 05 | Election 2008 | |
| WI-08 | Steve Kagen* | 54% | John Gard | 43% | Oct 04 | Oct 05 | SurveyUSA | |
| WI-08 | Democrat | 51% | Republican | 49% | Jan 01 | Jan 01 | Election 2006 | |
| Cong. Distr. | Democrat | D-pct | Republican | R-pct | Start | End | Pollster | |
| WY-AL | Democrat | 43% | Republican | 53% | Nov 05 | Nov 05 | Election 2008 | |
| WY-AL | Gary Trauner | 45% | Cynthia Lummis* | 49% | Oct 27 | Oct 29 | Research 2000 | |
| WY-AL | Gary Trauner | 44% | Cynthia Lummis* | 50% | Oct 18 | Oct 19 | SurveyUSA | |
| WY-AL | Gary Trauner | 44% | Cynthia Lummis* | 43% | Oct 14 | Oct 14 | Research 2000 | |
| WY-AL | Gary Trauner | 42% | Cynthia Lummis* | 42% | Sep 22 | Sep 24 | Research 2000 | |
| WY-AL | Gary Trauner | 44% | Cynthia Lummis* | 41% | May 20 | May 21 | Research 2000 | |
| WY-AL | Democrat | 47% | Republican | 48% | Jan 01 | Jan 01 | Election 2006 | |
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