I live in MA. Trust me, Romney’s no conservative. I won’t be voting for him...
Don't we all. But Romney is probably the most vulnerable to the Clinton attack machine, with McCain a close second. If Romney is the candidate, then there will be all sorts of underground whisper campaigns about his Mormonism. You'll see a bunch of stories about the wacko polygamist Mormons out on the fringes, none traceable to the Billary Bunch of course. Not that Hillary cares about Mormonism, good or bad, she just wants power, at any price. For myself, I'd gladly vote for any Mormon who was a real conservative as most, but not all, are.
If McCain is the opponent, she'll just have to insert a few questions that hit his hot buttons, and he'll lose his temper, live on National TV, and go the way of Dean, although he probably won't end up as the chair of the RNC. :)