It’s impossible to miss the “Hillary for Prison” signs at Trump rallies. At one of the Democratic debates, the moderator asked Hillary Clinton whether she would drop out of the race if she were indicted over her private email server. “Oh for goodness – that is not going to happen,” she said. “I’m not even going to answer that question.” Based on what I know about the emails, the idea of her being indicted or going to prison is nonsensical. Nonetheless, the belief that Clinton is dishonest and untrustworthy is pervasive. A recent New York Times-CBS poll found that 40%...