Virginia: Former Sen. George Allen (R)
Allen announced on January 24 that he would run for his former Senate seat. Allen's decision was no surprise; he had spent months shoring up support within the Virginia GOP.
"Today, I'm announcing my candidacy for the U.S. Senate," Allen said in his announcement video. "You know me as someone willing to fight for the people of Virginia. And I'd like the responsibility to fight for you again."
Allen's reelection bid -- as well as his career -- was derailed in 2006 when a video caught him derisively calling a Democratic opposition researcher "macaca" in a campaign appearance. Up to that point, Allen was leading in the polls and expected to win reelection. He was also being floated as a 2008 presidential contender.