Sitting on his campaign bus - laptop, turkey jerky, and coffee all nearby -Jeb Bush was befuddled over his campaign's failure to capture more attention from the news media. "I could drop my pants," he said in an interview. "Moon the whole crowd. Everybody would be aghast, except the press guys would never notice." Bush is entering the final days of his last stand, and hints of exasperation are leaking through his cheerful, stoic demeanor. Without a major comeback in New Hampshire on Tuesday, or, absent that, a Bush miracle in South Carolina later this month, he will face increasing...