An audience member ambushed John McCain on Thursday at an otherwise placid town hall meeting in Des Moines, Iowa, with a surprise question about whether he had ever called his wife by an obscene term. The man stood up and first said he wanted to ask the Arizona senator about a “mental health and mental health care” concern. “Previously I had been married to a woman who was very verbally abusive to me,” the man said. He paused and asked, “Is it true that you called your wife a c***?” The crowd booed, and McCain responded: