ABC NewsCharlie Crist continues political makeover with Barack Obama endorsementMiamiHerald.comFormer Gov. Charlie Crist's opinion piece is the latest in a series of political steps in which he appears to be preparing — as a Democrat — to challenge Gov. Rick Scott in 2014. By Steve Bousquet ST. PETERSBURG -- Former Florida Gov.Charlie Crist backs President ObamaCBS NewsFormer Fla.