Trump’s concentration camps are leading edge of a pattern of belief and behavior unfolding in plain sight. The comparison to atrocities of the 20th Century—whether the first U.S. concentration camps in the Philippines, the Soviet gulags, or even the Nazi concentration camps that after nearly a decade of slowly worsening crimes made the Holocaust possible—is obvious for a reason. Which is terrifying.

—Jonathan M. Katz, in “Don’t Look Away Now”