Bill Clinton, speaking for the twelfth time at a Democratic convention, delivered firm words. Like the cop who arrives at the door of a rowdy party, he wanted the music turned down a little. We were getting euphoric too soon, he warned. “We’ve seen more than one election slip away from us when we thought it couldn’t happen,” he said, clearly referring to Hillary’s 2016 loss to Trump. Don’t get “distracted by phony issues,” he admonished. “Never underestimate your adversary.”