The problem isn’t just that Romney frequently finds himself making detailed explanations, which is never a good thing in politics. The problem is that it always sounds a little odd to voters for Romney to say that when he did it in Massachusetts, it was a great thing, but when Barack Obama did it nationwide, it was a terrible thing…

It would certainly make Romney’s case more consistent; he could promise to end Obamacare without also having to explain himself. He would also bring his position in line with that of most Republican voters. But it might also be an unmitigated disaster, the most damaging flip-flop ever for a candidate known to change positions.

In the end, it’s almost impossible to imagine Romney would do it. When he talks about health care, there’s always a certain bravado — he has said he just can’t wait to engage Barack Obama in one-on-one debate over health care — that conceals the weakness of his position. He’s come too far to back down now, and odds are he will win or lose without ever admitting that Romneycare was the wrong thing to do.