Josh Marshall has it about right in 'The Moderates' Tale (or the Play-Acting Before the Cave) predicting that despite protestations by so-called moderate Republican lawmakers to the contrary, when push comes to shove, they will vote with their majority - this time it's health care, as they always do. Which is something that the most conservative wing does not do - witness government shutdowns. And why should the conservatives give in, if the moderates will always cave?
As JM states, "It is not only that the ‘GOP moderates always cave.’ It is that we are asked to (and almost always do) indulge this fainting couch routine or a furious bout of chin stroking that comes as a prelude to the cave."
Josh Marshall's example is Sen. Shelley Moore Capito of West Virginia, but we have one of those "moderates' right here in New England -- Maine Senator Susan Collins.
Contrast this TPM view of moderates with the Boston Globe take: Susan Collins won't back down on health care.
Like hell she won't! McConnell left Susan Collins out of the health care bill working group for one good reason - her vote could be taken for granted.
If, in the end, the moderates simply cave, then the only difference between the moderates and the extremists is the window dressing.