A loyal reader recently suggested that the reason Romney won't get a presidential nomination is because he's Republican. But as I've said before, I really don't see how that's an issue. These people would vote for Karl Marx if he promised them he'd crush liberals. No, I think Romney's problem is that he just doesn't have any fire in him and comes off a bit flavorless for the hardcore conservatives (and this is a standard by which Mark Sanford is hardcore and flavored).
Part of this is that the RedState-style Republicans like to imagine that they have standards, and so they automatically place Romney as an Establishment goon that they'd never vote for; not because they wouldn't vote for him (they will), but because they like to pretend they have standards. But if Romney talked a better game, he'd woo them over. But the sort of fire-breathing he'd have to do would make him untouchable for anyone else (plus, he just doesn't have enough soul to pull it off), so that just won't happen. And that's a big reason why he'd be a better candidate than any of the jerks these people want
And that's why Obama has little to worry about: The base simply doesn't want anyone sane enough to be electable. I just wish this was something more apparent to the Dem Establishment.