"Barely one in five Republicans knew that he supports abortion rights and civil unions for same-sex couples, the USA TODAY poll found. Nearly as many thought he was "pro-life" as said he was "pro-choice." When they were told about his stance on those issues, his star dimmed. One in five Republicans said his views would "rule him out as a candidate" they could support.
Link
I actually posted that myself. I think the poll was about the primary though. Whether that GOP fifth, would stay home, or vote for Hillary, or Joe Biden, or Obama, or Edwards, vis a vis Rudy, is questionable. But there is little doubt, that a Rudy versus Hillary electoral map, would look quite different from the Bush versus Kerry or Gore map. One major problem is Ohio, which is in a protectionist fit. The GOP candidate may well need to pick up another state from the blue column at least, say for example, New Jersey, to pick one at random. I also think Rudy would have enough traction, to grab Oregon and Washington.