Romney is now pledged to running against his own record.
This is an unusual strategy but one forced upon him by a) his actual record and b) the temper of the Republican party and conservative movement. All this trouble over one tiny bill he signed when Governor of Massachusetts! Because Obamcare is, in the view of plenty of sensible observers, merely a souped-up version of the Romneycare Mitt signed into law in Boston - and that he boasted about during the 2008 campaign. Back then it was a case of "I can fix health care because I've done it in the Bay State". How times change.
Actually, nothing changes as fast as Mitt Romney's principles. He aims to please.