Brian Beutler over at TPM just takes Jim DeMint to pieces on the question of just where he stood on Mitt Romney's health care plan four years ago. Excellent job, and great catch.
What this brings to mind, at least for me, is the question of whether Republicans really were serious about passing a national health care reform bill -- for example, had Romney won in 2008, and had GOP majorities in both Houses of Congress, would Romneycare have passed? I've never really thought so, but there's really no way to know for sure. This brings back the debate between Ezra Klein and Nate Silver over whether Barack Obama is really a 1990s Republican (and see more here). I've always believe that Romney's health care plan, or the GOP alternatives to Bill Clinton in 1993-1994, or Richard Nixon's proposal from twenty years before that, were either not serious or, perhaps, presented only when Republicans perceived that the alternative was worse. In other words, without the threat of Democrats passing something else, Republicans would not act on health care; they just aren't as interested in the subject.
So I don't really think that (on health care at least) Republicans have moved to the right; I think they've adopted new tactics, along with a change in the partisan situation. And I don't think that Mitt Romney and a GOP Congress would have passed a universal health care plan. But I'll certainly admit that my conclusions are speculative, nothing more.