Last Friday, he kicked off his weekend by firing off a set of abusive tweets at Carmen Yulin Cruz, the beleaguered mayor of San Juan, Puerto Rico. The explanation was not hard to glean: the . territory is a disaster zone in the wake of the devastation wrought by Hurricane Maria; he had not paid much attention to the sufferings of several million Americans for reasons easily guessed, and took a bludgeoning in the media for his negligence. And so after Cruz insisted that the plight of her city wasn’t “a good news story,” Trump decided to heap abuse on the strained leader of a suffering city. A decent president who thought Mayor Cruz’s reproaches unjustified would have gently ignored them, and perhaps pointed out what the federal government has done and can do for Puerto Rico. But then again, a decent man would not have repeatedly sneered at and damned an 81-year-old war hero with a lethal cancer.