Conservatives should acknowledge that the coverage expansion is real, it is large (though not as large as we were led to expect), and that while it is not necessarily going to make people much healthier, it is probably going to reduce financial hardship among at least some of the people who have gained coverage. That’s significant, though we can still argue about whether the benefit was worth the cost. (If Obamacare were being voted on today, I would still oppose it).

Liberals, however, should also acknowledge uncomfortable facts. The first is that most of the decrease in the uninsured population came in 2014 and 2015, and is now leveling off. Unless younger and healthier people start buying insurance in much larger numbers, we’re probably not going to see huge improvement. The fact that so few young, healthy people are buying insurance may not only mean that the number of uninsured people stops going down. It could mean that that figure starts going up again.

. . .