Senate in the 110th Congress (2007-2009)
| Senator | State | Party | Reelect |
| Jeff Sessions | Alabama | GOP | 2008 |
| Richard Shelby | Alabama | GOP | 2010 |
| Lisa Murkowski | Alaska | GOP | 2010 |
| Ted Stevens | Alaska | GOP | 2008 |
| Jon Kyl | Arizona | GOP | 2012 |
| John McCain | Arizona | GOP | 2010 |
| Blanche Lincoln | Arkansas | Dem | 2010 |
| Mark Pryor | Arkansas | Dem | 2008 |
| Barbara Boxer | California | Dem | 2010 |
| Dianne Feinstein | California | Dem | 2012 |
| Wayne Allard | Colorado | GOP | 2008 |
| Kenneth Salazar | Colorado | Dem | 2010 |
| Christopher Dodd | Connecticut | Dem | 2010 |
| Joseph Lieberman | Connecticut | Independent | 2012 |
| Joseph Biden | Delaware | Dem | 2008 |
| Thomas Carper | Delaware | Dem | 2012 |
| Mel Martinez | Florida | GOP | 2010 |
| Bill Nelson | Florida | Dem | 2012 |
| Saxby Chambliss | Georgia | GOP | 2008 |
| Johnny Isakson | Georgia | GOP | 2010 |
| Daniel Akaka | Hawaii | Dem | 2012 |
| Daniel Inouye | Hawaii | Dem | 2010 |
| Larry Craig | Idaho | GOP | 2008 |
| Michael Crapo | Idaho | GOP | 2010 |
| Dick Durbin | Illinois | Dem | 2008 |
| Barack Obama | Illinois | Dem | 2010 |
| Evan Bayh | Indiana | Dem | 2010 |
| Richard Lugar | Indiana | GOP | 2012 |
| Charles Grassley | Iowa | GOP | 2010 |
| Tom Harkin | Iowa | Dem | 2008 |
| Sam Brownback | Kansas | Dem | 2010 |
| Pat Roberts | Kansas | GOP | 2008 |
| Jim Bunning | Kentucky | GOP | 2010 |
| Mitch McConnell | Kentucky | GOP | 2008 |
| Mary Landrieu | Louisiana | Dem | 2008 |
| David Vitter | Louisiana | GOP | 2010 |
| Susan Collins | Maine | GOP | 2008 |
| Olympia Snowe | Maine | GOP | 2012 |
| Barbara Mikulski | Maryland | Dem | 2010 |
| Ben Cardin | Maryland | Dem | 2012 |
| Edward Kennedy | Massachusetts | Dem | 2012 |
| John Kerry | Massachusetts | Dem | 2008 |
| Carl Levin | Michigan | Dem | 2008 |
| Debbie Stabenow | Michigan | Dem | 2012 |
| Norm Coleman | Minnesota | GOP | 2008 |
| Amy Klobuchar | Minnesota | Dem | 2012 |
| Thad Cochran | Mississippi | GOP | 2008 |
| Roger Wicker | Mississippi | GOP | 2012 |
| Kit Bond | Missouri | GOP | 2010 |
| Claire McCaskill | Missouri | Dem | 2012 |
| Max Baucus | Montana | Dem | 2008 |
| Jon Tester | Montana | Dem | 2012 |
| Chuck Hagel | Nebraska | GOP | 2008 |
| Ben Nelson | Nebraska | Dem | 2012 |
| John Ensign | Nevada | GOP | 2012 |
| Harry Reid | Nevada | Dem | 2010 |
| Judd Gregg | New Hampshire | GOP | 2010 |
| John Sununu | New Hampshire | GOP | 2008 |
| Frank Lautenberg | New Jersey | Dem | 2008 |
| Robert Menendez | New Jersey | Dem | 2012 |
| Jeff Bingaman | New Mexico | Dem | 2012 |
| Pete Domenici | New Mexico | GOP | 2008 |
| Hillary Clinton | New York | Dem | 2012 |
| Chuck Schumer | New York | Dem | 2010 |
| Richard Burr | North Carolina | GOP | 2010 |
| Elizabeth Dole | North Carolina | GOP | 2008 |
| Kent Conrad | North Dakota | Dem | 2012 |
| Byron Dorgan | North Dakota | Dem | 2010 |
| Sherrod Brown | Ohio | Dem | 2012 |
| George Voinovich | Ohio | GOP | 2010 |
| Tom Coburn | Oklahoma | GOP | 2010 |
| James Inhofe | Oklahoma | GOP | 2008 |
| Gordon Smith | Oregon | GOP | 2008 |
| Ron Wyden | Oregon | Dem | 2010 |
| Bob Casey | Pennsylvania | Dem | 2012 |
| Arlen Specter | Pennsylvania | GOP | 2010 |
| Sheldon Whitehouse | Rhode Island | Dem | 2012 |
| Jack Reed | Rhode Island | Dem | 2008 |
| Jim DeMint | South Carolina | GOP | 2010 |
| Lindsey Graham | South Carolina | GOP | 2008 |
| Tim Johnson | South Dakota | Dem | 2008 |
| John Thune | South Dakota | GOP | 2010 |
| Lamar Alexander | Tennessee | GOP | 2008 |
| Bob Corker | Tennessee | GOP | 2012 |
| John Cornyn | Texas | GOP | 2008 |
| Kay Bailey Hutchison | Texas | GOP | 2012 |
| Robert Bennett | Utah | GOP | 2010 |
| Orrin Hatch | Utah | GOP | 2012 |
| Bernie Sanders | Vermont | Independent | 2012 |
| Patrick Leahy | Vermont | Dem | 2010 |
| Jim Webb | Virginia | Dem | 2012 |
| John Warner | Virginia | GOP | 2008 |
| Maria Cantwell | Washington | Dem | 2012 |
| Patty Murray | Washington | Dem | 2010 |
| Robert Byrd | West Virginia | Dem | 2012 |
| Jay Rockefeller | West Virginia | Dem | 2008 |
| Russell Feingold | Wisconsin | Dem | 2010 |
| Herb Kohl | Wisconsin | Dem | 2012 |
| Michael Enzi | Wyoming | GOP | 2008 |
| John Barrasso | Wyoming | GOP | 2012 |
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