As with so much about President Trump, his Phoenix rally on Tuesday night was two contradictory things: both shocking and completely predictable. Shocking because it was the most sustained attack any president has made on the news media. And predictable because this is exactly what Trump does when he’s in trouble. He finds an enemy and punches as hard as he can. Make no mistake, he is in trouble. With a special prosecutor breathing down his neck and even once-loyal Breitbart News turning on him, Trump is, according to one new poll, at the lowest point of his presidency. Never...