Was it stage fright or sedation? Body language expert analyzes Ben Carson's strange debate entrance

At the level of US presidential politics, a single gesture can be worth a thousand words. George HW Bush’s impatient downward glance at his wristwatch in the 1992 presidential debate, and Dan Quayle’s Adam’s apple jump in the 1988 vice-presidential debate – as Lloyd Bentsen said “You’re no Jack Kennedy” – come to mind. At last week's debate at Saint Anselm College in New Hampshire, another type of behavior stood out as a potent nonverbal signal. The specific sign was immobility.

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