Obama campaigns with former Republican Crist in crucial Florida from Reuters: Politics SEMINOLE, Florida (Reuters) - President Barack Obama kicked off a two-day bus tour of the key election battleground state of Florida on Saturday with former Florida Governor Charlie Crist, who endorsed Obama's 2008 rival John McCain but has since left the Republican Party. feeds.reuters.com/~r/Reuters/PoliticsNews/~3/1aiPzqCKsh0/us-usa-campaign-obama-idUSBRE88608T20120908