The week before Super Tuesday should see the GOP dumping its opposition research on McCain. (And there's so much to mine.)
This anti-McCain ad is in one way quite brilliant:
The Republican base ought to hate this. But in another way it's quite insidious. If McCain survives this sort of onslaught, it may make him more electable by making him seem less conservative.
Is that a bug or a feature?
(FWIW I think that McCain's real weakness is character. One gets the feeling that too many people who know him personally think that he's a wacko; and too often he talks like a warmonger.)