Have you had your 2016 Moment? I think you probably have, or will.

The Moment is that sliver of time in which you fully realize something epochal is happening in politics, that there has never been a presidential year like 2016, and suddenly you are aware of it in a new, true and personal way. It tends to involve a poignant sense of dislocation, a knowledge that our politics have changed and won’t be going back.

We’ve...