Political applause lines are a dime a dozen. We hear what seems like thousands of them during State of the Union addresses. And in recent years they've been creeping into presidential debates. Usually they're little more than safe affirmations of America's superiority, or assurances of coming prosperity. But I can't recall seeing a debate moment quite like this--and occasioned by a question put to a candidate--which occurred during last night's presidential address on jobs GOP debate: