Suppose despite our confident expectations, Newt somehow manages to become President? Nominating someone to teach a party a lesson can be a very dangerous game. It is not some Atlas election.
You act like the hypothetical presidencies of Mitt Romney and Newt Gingrich would be significantly different.
Yes, I do act that way because I believe it. Newt has a very poor temperament to be president, is a terrible manager, has a thin skin, lacks respect for the rule of law, has poor judgment, and thinks he knows a lot more than he in fact does. All in all, mix all of that in a bottle, and it will explode. This is not a game. This is real life.