Wallace kept trying to get the President to say that he would play by the normal rules, but each exchange only encouraged Trump to signal that he wouldn’t. A few minutes earlier, Wallace had asked the President about right-wing militia groups. Trump responded, “What do you want me to call them?” The Proud Boys, Biden said, from the other podium, naming a prominent far-right group. Trump said, “Proud Boys, stand back and stand by.” Biden flashed a big grin, which covered some of the chill of the moment: Had Trump meant to condemn the right-wing militias or encourage them? The Proud Boys’ chairman, Enrique Tarrio, wrote online, “Standing by sir.”