Given Zell Miller's endorsement of Bush, it is somewhat surprising that Georgia didn't go even more strongly for Bush.
Miller was very popular and respected while Governor and then at the beginning of his partial Senate term (and even through his election to that office), but I think his prestige among Georgians decreased considerably the longer he was in the Senate. I don't think his endorsement counted for much, since it was painfully obvious that he was no longer the same man as who served as governor during the 1990s.
Quite true. The Governor Zell Miller was a populist, yet the new Zell is some kind of reactionary conservative, advocating a national sales tax and the end of the direct election of Senators.