Five days from the New Hampshire primary, Ben Carson has yet to set foot in this state since his fourth-place finish in Iowa. His detour to Florida for a fresh set of clothes has become a running joke online. The candidate is, by all indications, consumed by what he calls the "dirty tricks" of Ted Cruz's campaign. "Dr. Carson feels absolutely robbed, violated," said Armstrong Williams, a Carson confidant, in a phone interview. "He realizes, the Democrats are not his enemies trying to malign him. It's people who smile in his face, shake his hand, go out to dinner with...