Republicans: still the party of Bush, still the party of occupation
As for the rank and file, Republicans still support Bush, the occupation, and even Bush's handling of the occupation by substantial margins. The latter is really quite baffling to me: Republicans support Bush's "handling of the situation with Iraq" by a 59-33 margin, according to the CBS poll to which Greenwald links.
These folks really are living in a different reality than the rest of us. It's pretty scary to realize how people can have completely different views of the same situation. So don't let Republicans off the hook for this disastrous occupation. They're still the ones driving this whole thing. And they haven't changed. Even after all this time.