Complete List of Senate Polls Used
Below we have a list of all the polls used on this site. Only nonpartisan polls are used; polls taken by pollsters working for one of the parties are intentionally omitted. The date given 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 an asterisk.
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, 2006 = day 1.0) and the second is the poll length in days.
The site also has a page describing the Senate 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.
| State | Democrat | Republican | Date | Len | Dem | GOP | Ind | Pollster |
| Arizona | Jim Pederson | Jon Kyl* | Nov 08 | 1 | 44% | 53% | Election 2006 | |
| Arizona | Jim Pederson | Jon Kyl* | Nov 02 | 3 | 40% | 53% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Nov 02 | 3 | 41% | 49% | Mason-Dixon | |
| Arizona | Jim Pederson | Jon Kyl* | Nov 05 | 10 | 46% | 50% | Polimetrix | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 30 | 6 | 41% | 46% | Zimmerman | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 27 | 5 | 44% | 52% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 22 | 4 | 41% | 47% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 15 | 1 | 42% | 51% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 16 | 3 | 43% | 48% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 16 | 6 | 33% | 49% | Northern Arizona U. | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 16 | 7 | 44% | 50% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 03 | 8 | 36% | 45% | Rocky Mountain | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 24 | 4 | 38% | 49% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 25 | 7 | 44% | 51% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 18 | 1 | 39% | 50% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 18 | 3 | 43% | 48% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 05 | 8 | 44% | 50% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Aug 29 | 6 | 36% | 46% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Aug 24 | 1 | 35% | 52% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Aug 21 | 7 | 44% | 48% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 18 | 1 | 34% | 53% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 16 | 3 | 40% | 52% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 19 | 9 | 42% | 50% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 21 | 14 | 27% | 45% | Rocky Mountain | |
| Arizona | Jim Pederson | Jon Kyl* | Jun 18 | 4 | 29% | 43% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Jun 19 | 9 | 42% | 48% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | May 24 | 1 | 34% | 53% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | May 07 | 3 | 37% | 52% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Apr 25 | 1 | 35% | 51% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Apr 23 | 4 | 31% | 42% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Mar 30 | 1 | 35% | 51% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Mar 27 | 9 | 42% | 47% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Feb 26 | 3 | 33% | 57% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Jan 13 | 9 | 42% | 52% | Zogby | |
| California | Dianne Feinstein* | Dick Mountjoy | Nov 08 | 1 | 60% | 35% | Election 2006 | |
| California | Dianne Feinstein* | Dick Mountjoy | Nov 04 | 3 | 60% | 31% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Nov 05 | 10 | 61% | 29% | Polimetrix | |
| California | Dianne Feinstein* | Dick Mountjoy | Oct 30 | 8 | 55% | 33% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Oct 25 | 3 | 59% | 33% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Oct 27 | 9 | 57% | 39% | Polimetrix | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 28 | 4 | 53% | 23% | Mason-Dixon | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 28 | 6 | 54% | 36% | LA Times | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 26 | 3 | 55% | 35% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 24 | 11 | 57% | 29% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 15 | 4 | 49% | 38% | Datamar | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 07 | 1 | 58% | 35% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | Aug 27 | 3 | 56% | 34% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Aug 22 | 1 | 56% | 34% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 23 | 14 | 56% | 34% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 18 | 14 | 42% | 21% | Public Policy Inst. | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 10 | 4 | 56% | 34% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 05 | 1 | 60% | 33% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | May 31 | 9 | 54% | 28% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | May 25 | 6 | 59% | 30% | LA Times | |
| California | Dianne Feinstein* | Dick Mountjoy | May 15 | 1 | 55% | 38% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | Apr 10 | 8 | 59% | 31% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Feb 26 | 15 | 56% | 28% | Field Poll | |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 08 | 1 | 40% | 10% | 50% | Election 2006 |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 04 | 3 | 38% | 9% | 49% | SurveyUSA |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 05 | 6 | 38% | 8% | 50% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 05 | 10 | 44% | 5% | 48% | Polimetrix |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 01 | 3 | 39% | 7% | 51% | Research 2000 |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 28 | 1 | 40% | 9% | 48% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 30 | 7 | 37% | 8% | 49% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 30 | 7 | 37% | 8% | 49% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 26 | 1 | 40% | 9% | 48% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 27 | 5 | 43% | 6% | 47% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 20 | 3 | 37% | 9% | 49% | ARG |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 19 | 3 | 35% | 6% | 52% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 16 | 7 | 43% | 4% | 49% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 10 | 3 | 40% | 4% | 53% | SurveyUSA |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 09 | 6 | 40% | 4% | 48% | U. of Conn. |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 02 | 1 | 40% | 6% | 50% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 02 | 8 | 33% | 4% | 53% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 25 | 5 | 39% | 5% | 49% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 25 | 7 | 44% | 4% | 46% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 19 | 5 | 45% | 3% | 47% | ARG |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 14 | 2 | 43% | 5% | 45% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 11 | 3 | 38% | 7% | 51% | SurveyUSA |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 05 | 8 | 42% | 3% | 46% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 21 | 1 | 43% | 6% | 45% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 21 | 5 | 42% | 3% | 44% | ARG |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 21 | 7 | 39% | 2% | 49% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 14 | 5 | 41% | 4% | 53% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 10 | 2 | 41% | 6% | 46% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Jul 18 | 6 | 27% | 9% | 51% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Jun 06 | 7 | 18% | 8% | 56% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Apr 30 | 6 | 18% | 10% | 56% | Quinnipiac U. |
| Delaware | Tom Carper* | Jan Ting | Nov 08 | 1 | 70% | 29% | Election 2006 | |
| Delaware | Tom Carper* | Jan Ting | Oct 24 | 7 | 60% | 26% | FDU | |
| Delaware | Tom Carper* | Jan Ting | Sep 19 | 6 | 63% | 23% | FDU | |
| Delaware | Tom Carper* | Jan Ting | 1 | 56% | 44% | 2000 Election | ||
| Florida | Bill Nelson* | Katherine Harris | Nov 08 | 1 | 60% | 38% | Election 2006 | |
| Florida | Bill Nelson* | Katherine Harris | Nov 04 | 3 | 59% | 36% | SurveyUSA | |
| Florida | Bill Nelson* | Katherine Harris | Nov 02 | 3 | 60% | 31% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Nov 01 | 2 | 58% | 34% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Nov 05 | 10 | 60% | 34% | Polimetrix | |
| Florida | Bill Nelson* | Katherine Harris | Oct 27 | 5 | 54% | 40% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Oct 22 | 5 | 64% | 29% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Oct 17 | 2 | 57% | 31% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Oct 16 | 7 | 54% | 37% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Oct 09 | 3 | 55% | 37% | SurveyUSA | |
| Florida | Bill Nelson* | Katherine Harris | Oct 08 | 6 | 61% | 33% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Oct 02 | 1 | 54% | 37% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Sep 28 | 3 | 58% | 31% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Sep 23 | 1 | 56% | 33% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Sep 22 | 3 | 53% | 35% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Sep 20 | 3 | 55% | 37% | Research 2000 | |
| Florida | Bill Nelson* | Katherine Harris | Sep 13 | 3 | 53% | 38% | SurveyUSA | |
| Florida | Bill Nelson* | Katherine Harris | Sep 05 | 8 | 51% | 33% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Aug 28 | 1 | 57% | 34% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Aug 21 | 7 | 52% | 32% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Aug 09 | 4 | 60% | 30% | Eldon | |
| Florida | Bill Nelson* | Katherine Harris | Jul 25 | 1 | 61% | 33% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Jul 24 | 6 | 61% | 24% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Jul 21 | 3 | 57% | 29% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Jul 19 | 9 | 52% | 34% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Jun 26 | 7 | 59% | 26% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Jun 22 | 1 | 54% | 32% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Jun 19 | 9 | 51% | 33% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | May 22 | 8 | 58% | 25% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | May 15 | 1 | 60% | 33% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Apr 17 | 7 | 57% | 27% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Apr 10 | 1 | 57% | 27% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Mar 27 | 9 | 59% | 38% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Mar 06 | 1 | 55% | 34% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Feb 20 | 6 | 53% | 31% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Feb 06 | 1 | 49% | 40% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Jan 13 | 9 | 51% | 40% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Jan 03 | 1 | 54% | 31% | Rasmussen | |
| Hawaii | Daniel Akaka* | (Primary 9/23) | Nov 08 | 1 | 63% | 35% | Election 2006 | |
| Hawaii | Daniel Akaka* | (Primary 9/23) | 1 | 73% | 25% | 2000 Election | ||
| Indiana | (unopposed) | Dick Lugar* | Nov 08 | 1 | 0 | 87% | Election 2006 | |
| Indiana | (unopposed) | Dick Lugar* | 1 | 32% | 67% | 2000 Election | ||
| Maine | Jean Bright | Olympia Snowe* | Nov 08 | 1 | 21% | 74% | Election 2006 | |
| Maine | Jean Bright | Olympia Snowe* | Oct 23 | 8 | 14% | 74% | Critical Insights | |
| Maine | Jean Bright | Olympia Snowe* | Oct 17 | 1 | 24% | 70% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Aug 23 | 8 | 26% | 53% | Portland Res. | |
| Maine | Jean Bright | Olympia Snowe* | Aug 17 | 1 | 20% | 68% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Jul 19 | 1 | 22% | 69% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Jul 21 | 8 | 10% | 68% | Strategic Mark. | |
| Maine | Jean Bright | Olympia Snowe* | Jun 15 | 1 | 26% | 66% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Feb 27 | 1 | 21% | 63% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Jan 25 | 1 | 20% | 52% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Nov 08 | 1 | 54% | 44% | Election 2006 | |
| Maryland | Ben Cardin | Michael Steele | Nov 06 | 4 | 49% | 46% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Nov 03 | 3 | 47% | 44% | Mason-Dixon | |
| Maryland | Ben Cardin | Michael Steele | Nov 03 | 4 | 47% | 47% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Nov 01 | 1 | 50% | 45% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Nov 05 | 10 | 51% | 45% | Polimetrix | |
| Maryland | Ben Cardin | Michael Steele | Oct 30 | 3 | 49% | 43% | Potomac Inc. | |
| Maryland | Ben Cardin | Michael Steele | Oct 30 | 7 | 49% | 44% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Oct 26 | 1 | 49% | 42% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Oct 27 | 5 | 53% | 44% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Oct 26 | 5 | 54% | 43% | Washington Post | |
| Maryland | Ben Cardin | Michael Steele | Oct 17 | 3 | 46% | 46% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Oct 16 | 7 | 51% | 43% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Oct 12 | 1 | 50% | 43% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Oct 01 | 5 | 54% | 39% | Gallup | |
| Maryland | Ben Cardin | Michael Steele | Oct 02 | 8 | 45% | 37% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Sep 26 | 5 | 47% | 41% | Mason-Dixon | |
| Maryland | Ben Cardin | Michael Steele | Sep 25 | 7 | 52% | 39% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Sep 19 | 3 | 47% | 48% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Sep 18 | 4 | 51% | 40% | Potomac Inc. | |
| Maryland | Ben Cardin | Michael Steele | Sep 13 | 1 | 50% | 43% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Sep 05 | 8 | 49% | 40% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Aug 31 | 7 | 44% | 39% | Gonzales | |
| Maryland | Ben Cardin | Michael Steele | Aug 09 | 1 | 47% | 42% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Jul 10 | 1 | 47% | 41% | Rasmussen | |
| Mass. | Ted Kennedy* | Ken Chase | Nov 08 | 1 | 69% | 31% | Election 2006 | |
| Mass. | Ted Kennedy* | Ken Chase | Nov 05 | 10 | 67% | 27% | Polimetrix | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 27 | 5 | 62% | 32% | Zogby | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 24 | 1 | 60% | 26% | Suffolk U. | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 25 | 4 | 60% | 25% | Granite State Poll | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 16 | 7 | 60% | 35% | Zogby | |
| Mass. | Ted Kennedy* | Ken Chase | 1 | 73% | 13% | 2000 Election | ||
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 08 | 1 | 57% | 41% | Election 2006 | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 04 | 3 | 52% | 42% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 02 | 3 | 53% | 34% | Selzer | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 02 | 3 | 53% | 37% | Mason-Dixon | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 05 | 10 | 55% | 40% | Polimetrix | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 01 | 3 | 51% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 30 | 5 | 52% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 27 | 5 | 49% | 42% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 24 | 2 | 52% | 41% | Research 2000 | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 25 | 4 | 50% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 24 | 3 | 51% | 44% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 22 | 1 | 55% | 39% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 16 | 7 | 48% | 44% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 09 | 4 | 53% | 42% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 04 | 1 | 56% | 39% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 04 | 2 | 48% | 35% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 25 | 7 | 49% | 42% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 17 | 3 | 54% | 41% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 12 | 6 | 54% | 34% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 05 | 8 | 50% | 44% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 31 | 1 | 51% | 43% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 30 | 3 | 50% | 37% | Selzer | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 22 | 2 | 51% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 21 | 3 | 51% | 42% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 21 | 7 | 49% | 45% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 14 | 6 | 54% | 42% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 10 | 1 | 49% | 44% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 07 | 3 | 48% | 41% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jul 19 | 9 | 48% | 42% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jul 12 | 6 | 50% | 29% | Selzer | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jun 19 | 9 | 49% | 41% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jun 09 | 5 | 48% | 34% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | May 08 | 4 | 54% | 36% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | May 08 | 8 | 55% | 28% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Apr 26 | 1 | 54% | 34% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Mar 27 | 9 | 52% | 38% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Feb 09 | 1 | 54% | 33% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jan 15 | 1 | 56% | 31% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jan 13 | 9 | 51% | 39% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 08 | 1 | 58% | 38% | Election 2006 | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 05 | 3 | 56% | 40% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 03 | 4 | 54% | 34% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 01 | 1 | 54% | 40% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 05 | 10 | 57% | 39% | Polimetrix | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 28 | 6 | 55% | 33% | U. of Minnesota | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 25 | 1 | 53% | 39% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 27 | 5 | 50% | 40% | Mason-Dixon | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 27 | 5 | 51% | 43% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 23 | 3 | 55% | 39% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 27 | 13 | 56% | 31% | St. Cloud U. | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 16 | 7 | 50% | 43% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 11 | 6 | 55% | 34% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 04 | 1 | 56% | 40% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 27 | 3 | 51% | 43% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 25 | 7 | 49% | 40% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 20 | 3 | 52% | 37% | Mason-Dixon | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 18 | 6 | 52% | 36% | U. of Minnesota | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 15 | 3 | 56% | 32% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 05 | 8 | 49% | 40% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 28 | 1 | 47% | 40% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 27 | 1 | 50% | 40% | Gallup | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 27 | 7 | 43% | 39% | FDU | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 21 | 7 | 50% | 42% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 01 | 1 | 50% | 38% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jul 23 | 3 | 47% | 42% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jul 19 | 9 | 49% | 43% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jul 11 | 6 | 50% | 31% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jun 26 | 1 | 47% | 44% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jun 19 | 9 | 49% | 41% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Apr 27 | 1 | 45% | 43% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Mar 27 | 9 | 49% | 41% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Feb 14 | 1 | 45% | 42% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jan 16 | 1 | 43% | 42% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jan 13 | 9 | 49% | 43% | Zogby | |
| Mississippi | Erik Fleming | Trent Lott* | Nov 08 | 1 | 35% | 64% | Election 2006 | |
| Mississippi | Erik Fleming | Trent Lott* | Feb 13 | 1 | 29% | 66% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 08 | 1 | 50% | 47% | Election 2006 | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 05 | 1 | 48% | 49% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 06 | 3 | 50% | 44% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 05 | 3 | 51% | 42% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 04 | 4 | 49% | 45% | Gallup | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 02 | 1 | 49% | 48% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 03 | 3 | 46% | 45% | Mason-Dixon | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 05 | 10 | 50% | 50% | Polimetrix | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 30 | 1 | 48% | 47% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 30 | 3 | 49% | 46% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 29 | 4 | 49% | 49% | Opinion Research | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 30 | 7 | 46% | 43% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 25 | 1 | 46% | 48% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 27 | 5 | 47% | 49% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 26 | 4 | 47% | 47% | Research 2000 | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 24 | 4 | 45% | 48% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 23 | 3 | 45% | 48% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 23 | 4 | 45% | 48% | LA Times | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 19 | 3 | 46% | 43% | Mason-Dixon | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 16 | 7 | 47% | 50% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 12 | 1 | 43% | 42% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 11 | 3 | 51% | |||