Ain't happening. Palin ain't going to put herself through that nightmare again. Duh, that's why she didn't run for President. She almost had a nervous breakdown before her debate with Biden in 2008 because she's a total idiot poseur with a 4th grade education. Not that the lemming cavemen on the right care if their candidates have book learnin'.
Obvious Political Rule #1 (obvious to everyone except unsophisticated dipshit tea baggers) -- If you think Africa is a country, you can't be President.
Anyway, Palin doesn't feel like memorizing 25 responses for a Vice Presidential debate again. She doesn't know anything, so faking her way through a debate is all she can do. She's already mentally ill and going through that again would probably push her over the edge.