| State
| Incumbent
| Party
| DKos tag
| Status
| Opposing candidates
| see also
|
| Alabama
| Jeff Sessions
| Republican
| AL-SEN
|
| Vivian Figures (D)
| AL-Sen
|
| Alaska
| Ted Stevens
| Republican
| AK-SEN
|
| Rocky Caldero (D) (cw),
| AK-Sen
|
| Arkansas
| Mark Pryor
| Democrat
| AR-SEN
|
|
| AR-Sen
|
| Colorado
| Wayne Allard
| Republican
| CO-SEN
| Retiring
| US Rep. Mark Udall (D) (cw),
Robert W. Schaffer (R) (cw)
| CO-Sen
|
| Delaware
| Joe Biden
| Democrat
| DE-SEN
|
|
| DE-Sen
|
| Georgia
| Saxby Chambliss
| Republican
| GA-SEN
|
| Dale Cardwell (D) (cw),
Vernon Jones (D) (cw),
Rand Knight (D) (cw)
| GA-Sen
|
| Idaho
| Larry Craig
| Republican
| ID-SEN
|
| Larry LaRocco (D) (cw)
| ID-Sen
|
| Illinois
| Richard Durbin
| Democrat
| IL-SEN
|
| Norm Hill (R) (cw),
Andy Martin (R) (cw),
Jim Nalepa (R) (cw),
Mike Psak (R) (cw),
Jim Rowe (R) (cw),
Steve Sauerberg (R) (cw)
| IL-Sen
|
| Iowa
| Tom Harkin
| Democrat
| IA-SEN
|
| Steve Rathje (R) (cw)
| IA-Sen
|
| Kansas
| Pat Roberts
| Republican
| KS-SEN
|
|
| KS-Sen
|
| Kentucky
| Mitch McConnell
| Republican
| KY-SEN
|
| Gregory D. Stumbo (D) (cw)
| KY-Sen
|
| Louisiana
| Mary Landrieu
| Democrat
| LA-SEN
|
|
| LA-Sen
|
| Maine
| Susan Collins
| Republican
| ME-SEN
|
| Tom Allen (D) (cw)
| ME-Sen
|
| Massachusetts
| John Kerry
| Democrat
| MA-SEN
|
| Ed O'Reilly (D) (cw),
Jeff Beatty (R) (cw)
Kevin Scott (R)
| MA-Sen
|
| Michigan
| Carl Levin
| Democrat
| MI-SEN
|
|
| MI-Sen
|
| Minnesota
| Norm Coleman
| Republican
| MN-SEN
|
| Mike Ciresi (DFL) (cw),
Jim Cohen (DFL) (cw),
Al Franken (DFL) (cw),
Dick Franson (DFL),
Jack Nelson-Pallmeyer (DFL) (cw),
James Broom Wellstone (I)cw)
| MN-Sen
|
| Mississippi
| Thad Cochran
| Republican
| MS-SEN
|
|
| MS-Sen
|
| Mississippi
| Trent Lott
| Republican
| MS-SEN
| Retiring
|
| MS-Sen
|
| Montana
| Max Baucus
| Democrat
| MO-SEN
|
| Mike Lange (R) (state house website)
| MT-Sen
|
| Nebraska
| Chuck Hagel
| Republican
| NE-SEN
| Retiring
| Jon Bruning (R) (cw),
Hal Daub (R) (cw),
Pat Flynn (D) (cw)
| NE-Sen
|
| New Hampshire
| John Sununu
| Republican
| NH-SEN
|
| Jeanne Shaheen (D)
| NH-Sen
|
| New Jersey
| Frank Lautenberg
| Democrat
| NJ-SEN
|
| Joe Pennacchio (R) (state legislature website),
Anthony Fisher (I) (cw)
| NJ-Sen
|
| New Mexico
| Pete Domenici
| Republican
| NM-SEN
| Retiring
| Jim Hannan (D) (cw),
Leland Lehrman (D) (cw),
Don Wiviott (D) (cw)
Tom Udall (D)
| NM-Sen
|
| North Carolina
| Elizabeth Dole
| Republican
| NC-SEN
|
| John Ross Hendrix (D) (cw)
| NC-Sen
|
| Oklahoma
| James Inhofe
| Republican
| OK-SEN
|
| Andrew Rice (D) (cw)
| OK-Sen
|
| Oregon
| Gordon Smith
| Republican
| OR-SEN
|
| Jeff Merkley (D) (cw,
Pavel Goberman (D) (cw),
Steve Novick (D)cw,
| OR-Sen
|
| Rhode Island
| Jack Reed
| Democrat
| RI-SEN
|
|
| RI-Sen
|
| South Carolina
| Lindsey Graham
| Republican
| SC-SEN
|
| Tim Carnes (R) (cw),
John Cina (R) (cw)
| SC-Sen
|
| South Dakota
| Tim Johnson
| Democrat
| SD-SEN
|
| Joel D. Dykstra (R) (state legislature website)
, Sam Kephart (R) (cw)
| SD-Sen
|
| Tennessee
| Lamar Alexander
| Republican
| TN-SEN
|
|
| TN-Sen
|
| Texas
| John Cornyn
| Republican
| TX-SEN
|
| Larry Kilgore (R) (cw),
Rick Noriega (D) (cw),
Emil Reichstadt (D),
Mikal Watts (D) (cw)
| TX-Sen
|
| Virginia
| John Warner
| Republican
| VA-SEN
| Retiring
| Mark Warner (D) (website)
| VA-Sen
|
| West Virginia
| Jay Rockefeller
| Democrat
| WV-SEN
|
|
| WV-Sen
|
| Wyoming
| Michael B. Enzi
| Republican
| WY-SEN
|
|
| WY-Sen
|
| Wyoming
| John A. Barrasso
(seat formerly held by Craig Thomas)
| Republican
| WY-SEN
|
|
| WY-Sen
|
