I can't see how McCain taking Palin off the ticket would help at this point. He went all in when he picked her, there's not much he can do now.
Speaking of which, before I watched the SNL skit, I watched the interview with Gibson. Oh wow. I just felt sorry for her. I've been in an interview before where I've been asked a question that I completely did not know the answer to, and it's a horrible feeling. Bush Doctrine, ouch. On the other hand, I watched the Palin/Hillary SNL skit afterwards, and it made it all the more hilarious.