By Daniel Strauss - 12/11/12 12:34 PM EST
Crist, the former Republican who became an independent during his run for the U.S. Senate in 2010, announced his move to the Democratic Party over Twitter on Friday.
"I'm a live and let live kind of guy," Crist said. "The Democratic Party is where I am much more comfortable."
He added that "middle of the road, common sense Republicans" are becoming increasingly rare.
Crist is currently considering a challenge to Florida Gov. Rick Scott (R) in 2014.
Crist has been welcomed by Democrats, with the new chairman of the Democratic Governors Association, Vermont Gov. Pete Shumlin, recently saying that Crist is "high on the list" of possible candidates to run for governor in Florida in 2014.