Chris Christie accused Marco Rubio of being an empty suit, a dilettante who repeats the same memorized speech over and over. Rubio's response: the same memorized speech. For a minute or so on Saturday night, the Republican golden boy seemed like a malfunctioning robot. Delivering the same confusing line four separate times -- Barack Obama, he said, "knows exactly what he's doing" -- Rubio proved the precise point Christie was trying to make. "There it is," Christie said, triumphant. "There it is, everybody." The Republican debate was held three days before the New Hampshire primary in which national front-runner Donald...