A couple of years ago, I gave a speech before a conservative, predominantly white audience. I couldn't help but notice a tall, heavyset Black man, arms folded, standing in the back. From time to time, I would look at him, only to see him frown and shake his head, I assumed disapprovingly, when I made what I considered important points. After the speech, he came up to me. "I am angry," he said. "Not at you -- at myself. I thought I was well informed. I read the news. I watch the news. I now see I've been manipulated by...