Mitt Romney's senior adviser in Florida has given up on the state

"The numbers in Florida show this was winnable," Brett Doster said in a statement obtained by the Miami Herald. "We thought based on our polling and range of organization that we had done what we needed to win. Obviously, we didn't, and for that I, and every other operative in Florida has a sick feeling that we left something on the table. I can assure you this won't happen again."

Obama campaign manager Jim Messina told reporters on a conference call Thursday that he believes the president will win Florida, giving him 332 electoral votes.