It's hard to imagine anybody being more polarizing that George W. Bush. His politics is based on that... I refer to Bob Woodward's book where Bush people talk about the base.  Bush gives few press conferences and they arrange appearances to demand loyalty - in the 2004 campagin, they didn't want undecided people at their rally. Think about that - part of giving speeches used to be to try to convince people, and the Bush/Rove political machine does pretty much the opposite.  Bush got 600,000 fewer votes in 2000 than Gore, and got 51 percent of the vote during a war.  That is Bush's political way during the past six years.
Compare that with Hillary Clinton. Six years ago she was looked at as a carpetbagger (with justification) in running for Senate in New York. In 2006, the Republicans are pretty much conceding her a Senate seat. Yeah, it's New York, but you would think they could do better upstate which isn't so solidly Democratic. And while the Republican/right-wing noise machine might "hate" her, she does have ability to work with Republicans in the Senate. She is successful as a politican, although that is probably because her husband is the master.Â
Hillary loses to McCain if that's the matchup in 2008 - it's like a team which doesn't match up against another team in a playoff series but could win it all if it doesn't have to play the difficult matchup. Yeah, a lot of people don't like Hillary but if she gets the nomination, the Republicans have to say hello to the gender gap.