WASHINGTON (CNN) – Sen. John Warner, R-Virginia, on Friday became the second senator to announce he will not seek re-election in 2008, joining fellow Republican Wayne Allard of Colorado on the campaign sidelines.
A total of 34 U.S. Senate seats will be up for grabs next year, with Republicans defending 22 seats, compared to 12 seats for Democrats.
A complete list of senators up in 2008 is available below.
SENATORS UP IN 2008
Alexander, Lamar R-Tennessee
(OPEN) Allard, Wayne R-Colorado
Barrasso, John R-Wyoming
Baucus, Max D-Montana
Biden, Joe D-Delaware
Chambliss, Saxby R-Georgia
Cochran, Thad R-Mississippi
Coleman, Norm R-Minnesota
Collins, Susan R-Maine
Cornyn, John R-Texas
Craig, Larry R-Idaho
Dole, Elizabeth R-North Carolina
Domenici, Pete R-New Mexico
Durbin, Richard D-Illinois
Enzi, Mike R-Wyoming
Graham, Lindsey R-South Carolina
Hagel, Chuck R-Nebraska
Harkin, Tom D-Iowa
Inhofe, James R-Oklahoma
Johnson, Tim D-South Dakota
Kerry, John D-Massachusetts
Landrieu, Mary D-Louisiana
Lautenberg, Frank D-New Jersey
Levin, Carl D-Michigan
McConnell, Mitch R-Kentucky
Pryor, Mark D-Arkansas
Reed, Jack D-Rhode Island
Roberts, Pat R-Kansas
Rockefeller, Jay D-West Virginia
Sessions, Jeff R-Alabama
Smith, Gordon R-Oregon
Stevens, Ted R-Alaska
Sununu, John R-New Hampshire
(OPEN) Warner, John R-Virginia