A candidate’s personal aide is normally told to remain quietly in the background. The so-called body man is supposed to be a constant, yet invisible, presence who is ready with a felt tip pen for autographs, prepared to operate any number of cameras, and knows what their boss wants to eat, and when. Garrett Jackson, who serves the role for Romney, can be seen in the background of numerous news photographs, usually with an earpiece surveying a crowd or guiding Romney to his next event (a rare exception was last week when Romney, in Jackson’s native Mississippi, told a crowd...