They are stuck with a guy that pretty much is being chastised for catering to his own electorate (Romney) when he was Governor of Ma. What do you think he would have done? They elected him, he did what he said he would.
Now, if you are running for election in a different state, or for the nation, do you say you will do things the exact same way as you did in your state office? Do you represent MA or the country? It is unfair to judge him on that, although I do not like his flipping either.
The sad thing is, people will not be unwilling to elect him because he flipped. They will not elect him because he is a Mormon and they are pig-headed bigoted idiots that will not admit the true source of their illegitimate concerns.
For a country that found it difficult to elect a CATHOLIC not too long ago, how do you think they would feel about Mormonism? Christ, they had a problem with an unsubstantiated rumor of Obama being Muslim, nevermind a guy that is openly not "salt of the earth" Baptist/Protestant.
And Newt? He is a brilliant asshole. He just is not attractive enough to be elected. Sad, but true. That is how we elect our leaders. Stage presence over actual substance.