YES. I've long thought that the way to beat McCain is to highlight his DIFFERENCES with conservatives. We've seen right now that even though he's won the nomination, he is beholden to hardline conservatives, so he will panic and proclaim just how much he loves Bush, which not only reveals what a backtracker and liar he is, but also links him strongly to one of the most despised figures in American politics today.
Arianna Huffington was A GENIUS when she said that McCain told her he didn't vote for Bush. He had to spend days assuaging conservatives that he did vote for Bush and does espouse Bush policies.