If we want to avoid undermining Obamacare, it would be better to try to tweak the tax rather than repeal it. It’s got numerous attributes and, as I readily admit, some potential problems. But the most important thing it has going for it is that it’s on the books. Those who think they can join ranks with O’care haters for repeal and break ranks with them to replace, in this Congress, are kidding themselves.

Over at WaPo.