Click on a state name below to read updates from the Crystal Ball and see the current state of each race:
Alabama
Richard Shelby (R) is seeking reelection
Alaska
Lisa Murkowski (R) is seeking reelection
Arizona
John McCain (R) is seeking reelection
Arkansas
Blanche Lincoln (D) is seeking reelection
California
Barbara Boxer (D) is seeking reelection
Colorado (special)
Michael Bennet (D) is seeking a full term
Connecticut
Chris Dodd (D) is not seeking reelection
Delaware (special)
Ted Kaufman (D) is not seeking a full term
Florida (special)
George LeMieux (R) is not seeking a full term
Georgia
Johnny Isakson (R) is seeking reelection
Hawaii
Daniel Inouye (D) is seeking reelection
Idaho
Mike Crapo (R) is seeking reelection
Illinois (special)
Roland Burris (D) is not seeking a full term
Indiana
Evan Bayh (D) is not seeking reelection
Iowa
Chuck Grassley (R) is seeking reelection
Kansas
Sam Brownback (R) is not seeking reelection
Kentucky
Jim Bunning (R) is not seeking reelection
Louisiana
David Vitter (R) is seeking reelection
Maryland
Barbara Mikulski (D) is seeking reelection
Missouri
Kit Bond (R) is not seeking reelection
Nevada
Harry Reid (D) is seeking reelection
New Hampshire
Judd Gregg (R) is not seeking reelection
New York
Chuck Schumer (D) is seeking reelection
New York (special)
Kirsten Gillibrand (D) is seeking a full term
North Carolina
Richard Burr (R) is seeking reelection
North Dakota
Byron Dorgan (D) is not seeking reelection
Ohio
George Voinovich (R) is not seeking reelection
Oklahoma
Tom Coburn (R) is seeking reelection
Oregon
Ron Wyden (D) is seeking reelection
Pennsylvania
Arlen Specter (D) is seeking reelection
South Carolina
Jim DeMint (R) is seeking reelection
South Dakota
John Thune (R) is seeking reelection
Utah
Bob Bennett (R) is seeking reelection
Vermont
Pat Leahy (D) is seeking reelection
Washington
Patty Murray (D) is seeking reelection
West Virginia (special)
Carte Goodwin (D) is not seeking a full term
Wisconsin
Russ Feingold (D) is seeking reelection