@JPB,
(All that I write next will be supposition and personal opinion based on discussions in several forums and personal contact with man-in-the-street politically active individuals)
I agree that it won't be Huntsman...mostly because I like Huntsman and he makes the most sense of the group. No way the Republicans will choose someone like that.
The base of the Republican party, as you noted, is split from here to Hell and back. But they have a tendency to unify when push comes to shove. They intend to get Obama out of that office...even if Genghis Khan were their candidate. The Republican base absolutely loathes Romney, but if he is their candidate...the vast majority of their base will vote for him. The Republican base wants Obama out more than anything in the world...which is why they are willing to trash our country rather than give him any help in needed legislation.
The Democratic Party base is so far out in left field, they can't even see home plate. There are HUGE numbers of liberals so furious with Obama (mostly because of their unrealistic expectations of him) that they want him out of the Oval Office MORE than the Republicans do.
With minor exceptions, the best I have heard from hard-core liberals about Obama is--he is one of the biggest disappointments ever, and I guess I will vote for him only because I despise the Republican candidates.
JPB, this is not a recipe for a victory!
At least, that is my opinion. I think there is a lot more trouble afoot than most Democrats want to acknowledge.