My worst nightmare--no hyperbole here--would be a 2008 presidential race between Hillary Clinton and John McCain. I won't explain, because if you've followed this blog at all you know why.
But chances are neither of the will win their party's nomination. Hillary because she's a whore; McCain because he's too much a maverick, as evidence, most recently, by his recent remark that Bush's order for warrantless eavesdropping wasn't authorized. The Far Right doesn't trust him, and without them he can't get their money, their delegates and therefore their nomination, and no doubt the Far Right now controls that process.
A blessing in disguise.