| 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 | | Barbara Mikulski,
Paul Sarbanes | |
| Massachusetts | | Edward Kennedy,
John Kerry | |
| Michigan | | Carl Levin,
Debbie Stabenow | |
| Minnesota | | Norm Coleman,
Mark Dayton | |
| Mississippi | | Thad Cochran,
Trent Lott | |
| Missouri | | Kit Bond,
Jim Talent | |
| Montana | | Max Baucus,
Conrad Burns | |
| Nebraska | | Chuck Hagel,
Ben Nelson | |
| Nevada | | John Ensign,
Harry Reid | |
| New Hampshire | John Sununu | Judd Gregg | |
| New Jersey | | Frank Lautenberg | Jon Corzine |
| 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 | Mike DeWine | George Voinovich | |
| Oklahoma | Tom Coburn | James Inhofe | |
| Oregon | | Gordon Smith,
Ron Wyden | |
| Pennsylvania | | Rick Santorum,
Arlen Specter | |
| Rhode Island | | Lincoln Chafee,
Jack Reed | |
| South Carolina | Jim DeMint,
Lindsey Graham | | |
| South Dakota | | Tim Johnson,
John Thune | |
| Tennessee | | Lamar Alexander,
Bill Frist | |
| Texas | | John Cornyn,
Kay Bailey Hutchison | |
| Utah | | Bob Bennett,
Orrin Hatch | |
| Vermont | | James Jeffords,
Patrick Leahy | |
| Virginia | George Allen | John Warner | |
| Washington | | Maria Cantwell,
Patty Murray | |
| West Virginia | | Robert Byrd,
Jay Rockefeller | |
| Wisconsin | Russ Feingold | Herb Kohl | |
| Wyoming | | Mike Enzi,
Craig Thomas | |