
Former Florida Gov. Charlie Crist once was a prominent figure in the Republican Party, but he left the GOP and declared himself an independent before aligning with the Democrats. (Associated Press)

** FILE ** Former Florida Gov. Charlie Crist once was a prominent figure in the Republican party. But he left the GOP and declared himself to be an independent before aligning with the Democrats. (Associated Press)

Former Florida Gov. Charlie Crist once was a prominent figure in the Republican party. But he left the GOP and declared himself to be an independent before aligning with the Democrats. (Associated Press)

Former Florida Gov. Charlie Crist once was a prominent figure in the Republican Party, but he left the GOP and declared himself an independent before aligning with the Democrats. (Associated Press)

Former Florida Gov. Charlie Crist, a Republican-turned-independent, seen here Thursday addressing the Democratic National Convention in Charlotte, N.C., polls well among Sunshine State Democrats. (Associated Press)

Former Florida Gov. Charlie Crist, a Republican-turned-independent, seen here Thursday addressing the Democratic National Convention in Charlotte, N.C., polls well among Sunshine State Democrats. (Associated Press)

President Obama (left) talks with former Florida Gov. Charlie Crist on Sept. 8, 2012, at a campaign rally in Seminole, Fla. (Associated Press)

President Obama, background, gets a hug from Charlie Crist after being introduced by the former Florida governor during a campaign rally Saturday, Sept. 8, 2012, in Seminole, Fla. (AP Photo/Chris O'Meara)

President Obama, background, gets a hug from Charlie Crist after being introduced by the former Florida governor during a campaign rally Saturday, Sept. 8, 2012, in Seminole, Fla. (AP Photo/Chris O'Meara)