Since he was sworn in as the 45th president, Mr. Trump has gotten into a spat with the media over the size of his inaugural crowd, was disrespectful toward the prime minister of Australia, took to Twitter to insult a federal judge, drew a moral equivalence between the United States and Russia, and called out Nordstrom for dropping Ivanka Trump’s clothing line. This kind of behavior is unbecoming of the president of the United States.