My biggest fear is if we don't put up a good alternative to McVain, say an 800-pound Gorilla like Giuliani, McVain will take his marbles and run as an independent. Can you say Madam President? I'm with Schlussel - taking a stance against Islamofascism and terrorism without being PC about it is #1 in my book. It's an issue people can agree on. McVain is a backstabber. If he doesn't get his way, watch out.
I am no big fan of McCain but do not believe he would do anything like that you fear. McCain thinks for himself and that can make him unpopular since he is somewhat unpredictable. But I don't believe him to be either disloyal or unstable. I don't fear him.