Too bad for Republicans, those people won't be voting for Perry. Disapproval doesn't equal votes for the opposition.
That's what they said FDR.
Who said what how why?
I'm using him as an example where a party's base collapses and votes for the opposite party. Republicans were basically on life support from 1932-1938.
I don't think it's an apt comparison - Perry is no FDR. He's the kind of guy that outright scares people in the other party, so unless it's revealed that Obama eats babies the day before the election it's not likely they'll vote for him.