Keeping Criminals Out

If it's a good idea, let's start with Donald

That line of Trump's, when I heard it on the radio—"Isn't it wonderful that we're keeping criminals out of our country?"—struck me as begging a couple of important and opposed questions: asking us to assume, on the one hand, that what he's been doing can be described that way, and on the other that it's an unambiguously good idea.

I've given a lot more a…