He's only defecting cause he can't win the Republican vote. He totally screwed himself by running for Governor as a Republican and then implementing Democratic policies. Now the Reps see him as a traitor, and the Dems see him as either a flip-flopper or a Republican. Either way, it doesn't matter, he's toast.
Not so much. It's been said for a while that in a 3 way race, he's actually got the best chance, because, you know, he's Charlie Fucking Crist.