I'm not convinced that he's going to win the nomination. He's got three big strikes going against him right off the bat.
While he is a threat, shoot any one that weilds the constitution as a weapon and doesn't treat it as a restraint on how far they can push the law is a threat to the American way, including McCain. There is too much time before the primaries, anything can happen that can propell any of the canidates or destroy their canidacy.