Despite Spate Of Negative Ads, Gingrich Stays Positive

Newt Gingrich has seen his once-sizable lead in Iowa collapse over the past couple of weeks. One of Gingrich's rivals, Texas Rep. Ron Paul, has taken to the airwaves with very tough ads targeting the former House speaker. And a pro-Mitt Romney super PAC has also run ads criticizing Gingrich. All this raises a question: Does traditional, on-the-airwaves negative advertising still work?