If she won the nomination (which I give about an 0.1% chance to), I'd leave the party.
Why? The moderates had free reign of the pres nod amongst the GOP since 1988. Except for W they all lost. It's time for a conservative to lead. Not Mittens or his Ilk. Ron Paul/Michelle Bachamann 2012 would teapartyslide Obama back to Hawaii.
There's a BIG difference between local crackpots and when they hit the big time... they don't do that well... ask O'Donnell, Miller, Angle and Buck.
You really do live in fantasy land don't you?