I'm sure someone who is pro-gay rights, pro-choice, pro-gun control, pro-universal healthcare, anti-free trade and anti-war has a great chance at winning the Republican Nomination in 2012.
Anti-free trade is at least a popular position among GOP primary voters, something like 61% of the Teabaggers oppose it. And the party is less obsessed with war lately although he's certainly indicated he'd be willing to bomb Iran before so it's not like that would be as much of an issue... Not that issues really matter half as much as people think they do on this board for some reason.