Ah, but to be sort of serious for a moment...there are basically two ideas that people have about this. The majority opinion is represented in this tweet from the pollsters at PPP (and see their post here):
Herman Cain's supporters love Newt Gingrich and HATE Mitt Romney...true in all 7 GOP polls we've done this monthWhile the minority opinion would go to a comment over at NRO from a Paul Zummo:
It will be amusing to witness the cognitive dissonance that takes place when Cain drops out and endorses Romney. I'm not sure whose heads will explode with the most force: Cainiacs or Romneybots.I have no idea whether Cain will drop out this week, or after Iowa, or even after New Hampshire...but I'm with the minority opinion here: that sounds just about right to me. Sure, it's possible that Cain won't endorse the Mittster -- you can't predict individual actions of this sort -- but the pattern of endorsements so far has been very clear, and it hasn't slowed down or halted during Gingrich's surge. That makes me believe we're going to see more mainstream conservatives, and perhaps even some Tea Partiers, backing Romney. Including, I strongly suspect, some of the current candidates as they drop out.
As I've said before, I just don't see a solid, very large anti-Romney block of voters in the GOP. A faction, perhaps 20% or 25% tops, yes, but that's it. And it's clearly true that there's no great enthusiasm for Romney. But the same can be said of all the other candidates, none of whom has been able to approach 50%, either. And party actors have been very reluctant to line up for any of the surge candidates other than (while he was hot) Rick Perry. Which, again, makes me believe that if Perry (somehow) catches fire again he'll have a real shot at the nomination, but the other anti-Romneys just don't.