The Coming Crisis of Legitimacy

In normal times, it would seem outlandish to worry that an American president might refuse to concede defeat upon losing his bid for reelection. This year it is not. Even though he won in 2016, Donald Trump falsely claimed that he was the victim of voter fraud. And when he sat down for an interview with Fox News’ Chris Wallace this July, he said: “I think mail-in voting is going to rig the election. I really do.”

Visibly alarmed, Wallace asked whether Trump would accept the outcome of the election...