as of July 2009
| States | Senator1 | Senator2 |
|---|---|---|
| Alabama | Sessions, Jeff | Shelby, Richard C. |
| Alaska | Begich, Mark | Murkowski, Lisa |
| Arizona | Kyl, Jon | McCain, John |
| Arkansas | Lincoln, Blanche L. | Pryor, Mark L. |
| California | Boxer, Barbara | Feinstein, Dianne |
| Colorado | Bennet, Michael F. | Udall, Mark |
| Connecticut | Dodd, Christopher J. | Lieberman, Joseph I. |
| Delaware | Carper, Thomas R. | Kaufman, Edward E. |
| Dist. of Columbia | ||
| Florida | Martinez, Mel | Nelson, Bill |
| Georgia | Chambliss, Saxby | Isakson, Johnny |
| Hawaii | Akaka, Daniel K. | Inouye, Daniel K. |
| Idaho | Crapo, Mike | Risch, James E. |
| Illinois | Burris, Roland W. | Burris, Roland W. |
| Indiana | Bayh, Evan | Lugar, Richard G. |
| Iowa | Grassley, Chuck | Harkin, Tom |
| Kansas | Brownback, Sam | Roberts, Pat |
| Kentucky | Bunning, Jim | McConnell, Mitch |
| Louisiana | Landrieu, Mary L. | Vitter, David |
| Maine | Collins, Susan M. | Snowe, Olympia J. |
| Maryland | Cardin, Benjamin L. | Mikulski, Barbara A. |
| Massachusetts | Kennedy, Edward M. | Kerry, John F. |
| Michigan | Levin, Carl | Stabenow, Debbie |
| Minnesota | Klobuchar, Amy | Franken, Al |
| Mississippi | Cochran, Thad | Wicker, Roger F. |
| Missouri | Bond, Christopher S. | McCaskill, Claire |
| Montana | Baucus, Max | Tester, Jon |
| Nebraska | Johanns, Mike | Nelson, Ben |
| Nevada | Ensign, John | Reid, Harry |
| New Hampshire | Gregg, Judd | Shaheen, Jeanne |
| New Jersey | Lautenberg, Frank R. | Menendez, Robert |
| New Mexico | Bingaman, Jeff | Udall, Tom |
| New York | Gillibrand, Kirsten E. | Schumer, Charles E. |
| North Carolina | Burr, Richard | Hagan, Kay R. |
| North Dakota | Conrad, Kent | Dorgan, Byron L. |
| Ohio | Brown, Sherrod | Voinovich, George V. |
| Oklahoma | Coburn, Tom | Inhofe, James M. |
| Oregon | Merkley, Jeff | Wyden, Ron |
| Pennsylvania | Casey, Robert P., Jr. | Specter, Arlen |
| Rhode Island | Reed, Jack | Whitehouse, Sheldon |
| South Carolina | DeMint, Jim | Graham, Lindsey |
| South Dakota | Johnson, Tim | Thune, John |
| Tennessee | Alexander, Lamar | Corker, Bob |
| Texas | Cornyn, John | Hutchison, Kay Bailey |
| Utah | Bennett, Robert F. | Hatch, Orrin G. |
| Vermont | Leahy, Patrick J. | Sanders, Bernard |
| Virginia | Warner, Mark R. | Webb, Jim |
| Washington | Cantwell, Maria | Murray, Patty |
| West Virginia | Byrd, Robert C. | Rockefeller, John D. |
| Wisconsin | Feingold, Russell D. | Kohl, Herb |
| Wyoming | Barrasso, John | Enzi, Michael B. |