If only those people will vote for Perry who have had a similar moment of not being able to remember something that's "on the tip of their tongue" he would win in a landslide.
It may be that his campaign is finished after last night but I hope not. We are still almost 2 months away from the first caucuses--we need more "not Romeny" candidates than just Cain in case Cain can't convince primary voters that he is a viable candidate. Gingrich is smarter and more articulate than Perry but very vulnerable because of his personal history. We need someone who can beat Obama and who wold be a good President and who is a genuine conservative. I'm not convinced yet that Cain meets the "can beat Obama" criterion.
Newt just doesn't have the charisma and plain talking abilities that come naturally to Cain.
I do think that a Cain/Newt Ticket would be fantastic.