Charlie Crist: The man who doesn't believe in anything

Charlie Crist’s last-minute invitation to speak at the Democratic convention will serve Barack Obama’s purposes well. Crist, a former Republican governor of Florida and an Independent candidate for Senate in 2010, provides a nice foil to the party-switchers of whom Republicans are so proud — most notably former Rep. Artur Davis, D-Ala.

Party-switchers have given Republicans a PR boost. They even helped the GOP take solid control of state legislatures in both Louisiana and Alabama in the last cycle. But Crist is also a bit of an own-goal. He is a damaged figure, who would have been happy to go on a Republican forever, had it served his career.