Repeatedly?
Bush is incredibly stressed out. He cannot handle this. This needs to be part of our message in the post debate spin.
From Psychology today:
http://www.findarticles.com/p/articles/mi_m1175/is_n3_v22/ai_6406107"Increased blinking is often a sign of physical or psychological stress. People blink more when angry or excited, for example. And one of the earliest studies in blink research determined that anxiety can increase the blink rate: While courtroom witnesses were under hostile cross-examination they blinked much more frequently.
Richard Nixon is a case in point, says Stern, who first became interested in blinking during the Watergate era. "President Nixon's blink rate markedly increased when he was asked a question he was not prepared to answer," Stern says. "His speech was well-controlled and did not manifest other symptoms of anxiety, but you could see it in his eyes. Most politicians have learned to disguise feelings except in ways they cannot inhibit."
State-of-the-art blink research involves monitoring each phase of a blink -- measuring how long it takes the lid to close, how long the eye stays closed and how quickly the lid reopens. Each portion of the blink can act as a telltale clue to what kind of shape the blinker is in. Fatigue, alcohol and drugs make blinks less crisp, and drowsiness can increase the time the eye remains closed by 50 o 80 milliseconds."