I think my strongest asset, maybe by far, is my temperament,” Donald Trump said in the first Presidential debate, at Hofstra University, on Long Island, on Monday night. “I have a winning temperament. I know how to win.” On the split screen, his opponent, Hillary Clinton, looked amused, as she did through much of the debate. She appeared to think that she was winning; on balance, she was right. Lester Holt, of NBC, the moderator, tried to turn to Clinton, but Trump stopped him. He had more to say about this temperament thing.