My initial thought on that is "I hope she withholds it."
One could argue Palin was heavily vetted. Cain hasn't been.
And now that he is a viable threat to Romney, Mitt will send out his thugs to start doing the dirty work to take out Cain. I like Cain alot, but he has not been scrutinized before because he wasn't taken seriously. It's about to get ugly for Mr. Cain.