Salena Zito, a reporter with the Pittsburgh Tribune-Review, watched Mitt Romney’s Sept. 12 news conference from a diner in Wisconsin. Customers paid careful attention to the TV as reporters repeatedly asked Romney if he had made a mistake by criticizing President Obama’s handling of the embassy crises in Egypt and Libya. The exchanges left no doubt that Romney’s questioners thought he had made a mess of the situation. But Zito found an entirely different reaction in the diner. “People were just floored by the press,” she says. “The group was pretty mixed between Obama supporters and Romney supporters, and even …