Digby may be correct here:
I don't know if anyone's noticed, but George W. Bush is being disappeared from the presidential campaign and everyone's running against incumbent Hillary Clinton. Subtly, but relentlessly, the public psyche is being prepared to deny Junior ever existed. And it could work. For many different reasons, most Americans want nothing more than to forget George W. Bush was ever president. So, we see a very odd subliminal narrative taking shape in which the blame for the nation's failures of the last seven years is being shifted to Clinton (and the "do-nothing" Democratic congress) as if the Codpiece hasn't been running things since 2000. (Not that the radical wingnuts haven't always blamed the Clenis for everything, but the disappearing of Bush is a new element.)
I certainly don't blame the Republicans for trying to do it. It makes sense, since their boy is an epic failure and the original Clinton is still very present in people's minds. It will be quite a trick to pull off, but I can see the press already helping them do it. (Naturally.)
If you think about it this may explain why so many Republicans are apparently planning to vote for Rudy Giuliani. The man is a warmonger and fascist that makes George W. Bush look like a piker.