On the cliffs of Normandy, in a small holding area, the president of the United States was looking out at the English Channel. It was only six weeks ago, on the 80th anniversary of the D-Day landings, and President Biden had just finished his remarks at the American cemetery atop Omaha Beach. Guests had been congratulating him on the speech, but he didn’t want to talk about himself. The moment was not about him; it was about the men who had fought and died there. “Today feels so large,” he told...