If you missed the debate you can see a clip of Newt's response to John King here:
Liberal media absolutely love it when they can get a candidate to respond in immediate anger. That's when candidates say things they later regret. But it's always too late. The response is on tape already and will become the sound bite of the day or the next week.
Never, never respond immediately when you're angry. Always, always "count to 10". Then, if the cheap shot warrants it, respond with controlled outrage and righteous indignation. But only if it is needed. Many cheap shots can be just ignored or blown off with a scornful comment. Never dignify a really cheap shot with an extended defensive response. That just feeds the media and "gives the story legs."
Do not think for a moment that Speaker Gingrich's response was off the cuff. He and his team obviously expected the question and were well prepared for it. His immediate response was exactly what was called for and well-prepared.
As a result he soared in the polls and won the primary.
The rest of us can take a lesson from him.