They say that if you live long enough, you’ll get to experience nearly everything, and so it has been for Joe Biden, who has lived to see history’s first Zoom presidential campaign. Unfortunately for him, it’s his. Nobody looks good on Zoom—or FaceTime or Skype or any of the other online simulacra of human interaction that the lockdown has forced upon us. It diminishes all the distractions and intangibles that give life texture and zest, that make life seem rather pleasanter than it is. Did anyone fully understand just how unfunny late-night talk-show hosts are—take your pick; I pick Stephen...