Thank you, Ron Paul

Alone among the contenders, Paul, a veteran Texas congressman with a libertarian streak, made the case for withdrawing troops. That drew a sharp challenge from Chris Wallace, one of the debate questioners, who asked whether the United States should take its marching orders from al-Qaida.

"No! We should take our marching orders from our Constitution," Paul shouted back, pointing his pen at Wallace for emphasis. "We should not go to war without a declaration" by Congress.