Frum makes it. He sees Romneycare, a major political vulnerability for Romney in the primaries, as a governing strength:
Republicans need a realistic approach to what is feasible in the reform of ACA. There are deals to be done to fix its worst problems (the financing mechanism, the additional Medicaid burdens on states, the lack of cost control) — but outright repeal will convulse the American political system for years and very likely end in failure. The candidate who can make the necessary deals is the one who understands the health system best — and also the one candidate who cannot be accused of secretly wishing to destroy the principle of universal coverage.
The Dish 