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