| 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 | Tom Harkin | Chuck Grassley | |
| 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 | Debbie Stabenow | Carl Levin | |
| Minnesota | Amy Klobuchar | Norm Coleman | |
| Mississippi | | Thad Cochran,
Trent Lott | |
| Missouri | | Kit Bond,
Claire McCaskill | |
| 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 | | George Voinovich | Sherrod Brown |
| Oklahoma | | Tom Coburn,
James Inhofe | |
| Oregon | Ron Wyden | Gordon Smith | |
| Pennsylvania | | Bob Casey,
Arlen Specter | |
| Rhode Island | Sheldon Whitehouse | Jack Reed | |
| South Carolina | | Jim DeMint,
Lindsey Graham | |
| South Dakota | | John Thune | Tim Johnson |
| Tennessee | | Lamar Alexander,
Bob Corker | |
| Texas | | John Cornyn,
Kay Bailey Hutchison | |
| Utah | | Bob Bennett,
Orrin Hatch | |
| Vermont | Patrick Leahy,
Bernard Sanders | | |
| Virginia | | John Warner,
Jim Webb | |
| Washington | Maria Cantwell,
Patty Murray | | |
| West Virginia | Robert Byrd | Jay Rockefeller | |
| Wisconsin | Russ Feingold,
Herb Kohl | | |
| Wyoming | | Mike Enzi,
Craig Thomas | |