As he made his final pitch to voters in western Wisconsin last week, Sen. Ron Johnson told a story about a truck driver who got stuck while navigating a tricky road. The senator said he was driving through Portage when he encountered a traffic snarl caused by the immobile truck. Johnson said he is typically impatient but was not in this case because he witnessed something “heartwarming”: The people of the small community in central Wisconsin sprang into action to help the truck driver get going again. He ended the story with this reveal: “You know, one little point really...