Well, he ain't got long to find it before he's out of a job and hailed as the 21st centurys Peanut farmer. All the Republicans have got to do is not to elect a complete lunatic. Palin, I'm looking at you.
Put a clever guy up there who doesn't rely on scaring everyone to get votes, and Obama will be history.
EDIT: Although credit to Carter, I didn't realise he was a nuc. He's certainly done a lot post-presidency though, so I have no criticism on him there.