Will the United States belatedly fulfill its promise as a multiracial democracy?
Adam Serwer writes: After George Floyd was killed, Donald Trump sensed an opportunity. Americans, anguished and angry over Floyd’s death, had erupted in protest—some set fires, broke the windows of department stores, and stormed a police precinct. Commentators reached for historical analogies, circling in on 1968 and the twilight of the civil-rights era, when riots and rebellion engulfed one American city after another. Back then, Richard Nixon seized on a message of “law and order.” He would restore normalcy by…