The point, you see, is not to advance (incrementally or otherwise) the conservative ball but to remain forever aggrieved. Whatever deal is attainable and whichever candidate is acceptable to a broad cross-section of Americans are almost by definition unacceptable to those voices.
So in a sense, the fall of Cain, the collapse of Perry, and the potential nomination of Romney really are a catastrophe for these folks. Notice how their interests now diverge from the interests of the party in gaining governing majorities and the White House? They’re only happy if the most flawed candidates survive? Something is amiss. Indeed it is. You’ll hear plenty more of it, and some weird defenses of candidates, any candidate other than Romney, any candidate who couldn’t possibly win. The far right echo chamber is going to be screeching at fever pitch. The rest of the party, and the country at large, will be just fine.