Romney has stood by his Mass plan actually, and said that while it isnt perfect it suited the needs of the state at the time. He has also said repeatedly that he thinks that the State level is the proper format for that type of legislation.

I think the word twisting regarding how he has said it "is a model for the nation" and trying to make it sound like he endorses a Federal program is unfair.

For who could be free when every other man's humour might domineer over him? - John Locke (2nd Treatise, sect 57)