MILLSBORO, Del. - At 7 p.m. on Thursday, in the back shed of a firehouse, a presidential candidate who continually concedes he's unlikely to capture the Republican nomination held a rally - and 350 people showed up. Earlier, Newt Gingrich spoke to more than 150 people in nearby Magnolia. And a day earlier, he greeted a sold-out auditorium that seats more than 400 at the UniversityofNorthCarolina-Wilmington. The Republicans who come to Gingrich's campaign events, signs in hand and ready to offer standing ovations, are under no illusions that the former House speaker is going to overtake Mitt Romney to become...