Last week, my colleague Bret Stephens imagined a news article on the morning after President Trump’s re-election. Today, I imagine a different outcome. In the end, it was a lot simpler than it often seemed. Donald J. Trump, who spent much of the past four years as a historically unpopular president, lost his bid for re-election Tuesday. His approval rating hasn’t approached 50 percent since he took office, and neither did his share of the vote this year. In an era of deep national anxiety — with stagnant wages, rickety health insurance and aggressive challenges from China and Russia —...