I don't think you're correct. The extremists will make fun of his weight, that's a given. What else are they going to say. They can't debate him on fiscal policy issues and not come out looking like ignoramuses. He has a way with words on that subject.

He's a fiscal conservative, a social moderate, coupled with a few liberal ideas besides. He can definitely grab Obama votes, and if he does wind up the Republican candidate, what else can we Republicans do but vote for him. We can worry about his "less than conservative" qualities later; maybe after he "cuts the government fat", so to speak.

I'm not endorsing, but merely speculating.