Donald Trump, whose 2016 presidential campaign was consciously modeled after Richard Nixon's 1968 run, seems to think he can win reelection by emulating his predecessor's appeal to a "silent majority" disgusted by raucous anti-war protests. Trump is offering voters a choice between his firm hand and the pusillanimity of "liberal Democrats" who let "violent anarchists" run wild in the streets. Notwithstanding Trump's pose as "your president of law and order," his heavy-handed reaction to the protests triggered by George Floyd's death represents neither. In response to largely peaceful demonstrations against police brutality that have been punctuated by criminal behavior, he...