Florida Gov. Charlie Crist looks on as Republican presidential candidate Sen. John McCain, R-Ariz. speaks during a campaign rally in Miami, Wednesday, Oct. 29, 2008. (AP Photo/Alan Diaz)

Florida Gov. Charlie Crist looks on as Republican presidential candidate Sen. John McCain, R-Ariz. speaks during a campaign rally in Miami, Wednesday, Oct. 29, 2008. (AP Photo/Alan Diaz)

Florida Governor Charlie Crist, shown with Carole Rome Sunday Nov. 25, 2007 on the sidelines of the Washington Redskins and Tampa Bay Buccaneers NFL football game. Crist proposed to Rome Thursday July 3rd at his St. Petersburg, Fla., apartment. (AP Photo/Chris O'Meara)

In this April 22, 2008 file photo, Florida Gov. Charlie Crist talks about health care issues during a news conference in Tallahassee, Fla. The Memorial Day weekend guest list at McCain's Arizona retreat runs to at least three Republicans mentioned as potential vice presidential running mates, but a top aide said Wednesday that vetting possible veeps is not on the agenda. Crist, Louisiana Gov. Bobby Jindal and former Massachusetts Gov. Mitt Romney, a McCain rival in the primary, were invited to a weekend gathering at the senator's place in Sedona. (AP Photo/Phil Coale, File)

Gov. Charlie Crist speaks at a news conference to call on the Democratic National Committee to seat their Florida delegates at the national convention, Wednesday, March 5, 2008, in Tallahassee, Fla. Charlie Crist and Michigan Gov. Jennifer M. Granholm released a joint statement Wednesday making the plea and saying the voices of 5 million voters should not be "silenced." (AP Photo/Phil Coale)

Gov. Charlie Crist speaks at a news conference to call on the Democratic National Committee to seat their Florida delegates at the national convention, Wednesday, March 5, 2008, in Tallahassee, Fla. Charlie Crist and Michigan Gov. Jennifer M. Granholm released a joint statement Wednesday making the plea and saying the voices of 5 million voters should not be "silenced." (AP Photo/Phil Coale)

Florida's Gov. Charlie Crist, left, introduces the Republican candidates participating in the CNN/YouTube debate in St. Petersburg, Fla. Wednesday, Nov. 28, 2007. Behind Crist, left to right: Former Sen. Fred Thompson, R-Tenn., Sen. John McCain, R-Ariz., Rep. Duncan Hunter, R-Calif. and Rep. Duncan Hunter, R-Calif..(AP Photo/Chris O'Meara)

Florida's Gov. Charlie Crist, left, introduces the Republican candidates participating in the CNN/YouTube debate in St. Petersburg, Fla. Wednesday, Nov. 28, 2007. Behind Crist, left to right: Former Sen. Fred Thompson, R-Tenn., Sen. John McCain, R-Ariz., Texas Rep. Ron Paul. and Rep. Duncan Hunter, R-Calif..(AP Photo/Chris O'Meara)

Florida Gov. Charlie Crist, fourth from left, joins Republican presidential hopeful Rep. Tom Tancredo, R-Colo., from left to right, former Arkansas Gov. Mike Huckabee, former Massachusetts Gov. Mitt Romney, former New York Mayor Rudy Giuliani, former Sen. Fred Thompson, R-Tenn., Sen. John McCain, R-Ariz., Rep. Ron Paul, R-Texas, and Rep. Duncan Hunter, R-Calif., on the stage at the start of the CNN YouTube Republican party presidential debate Wednesday, Nov. 28, 2007 at the Mahaffey Theater in St. Petersburg, Fla. (AP Photo/Chris O'Meara)