Why McCain’s acceptance speech worked.St. Paul — On Wednesday, I headed between events from Minneapolis to Saint Paul, driven by a woman named Kimberly. She was white, a mom in her late 40s, with a tattoo on her forearm and a mild Minnesota accent. She did not look like a typical Republican voter. She certainly was nothing like the party faithful who had flocked to her town. I asked her what she thought of the convention, and she complained about the protesters who had come in from outside, breaking things and hurting business. “That’s just dumb,” she said. “There’s a...