Hard to say. He's never lost a race, but then again, he's never faced a superior challenger either. He's always won because he stank less than his opponents.
I don't really know how he'll react to going up against Sarah. One thing's for sure, he can't match her for strategy, or genuineness. He comes off as plastic and arrogant, next to her.
Let’s hope that he’ll do the honorable thing and withdraw, if she runs in order to avoid splitting the Republican vote.