. >> i'm joined by howard bragman. good to see you. i've never seen anything quite like this. let's go through these. michele bachmann's new ad, hit the air this week. let's take a look. >> born and raised in iowa, only one candidate has been a consistent conservative fighter who fought obama care, fought increasing our debt ceiling, even as other republicans were cutting deals with obama. >> comparing herself to margaret thatcher, gutsy, isn't it? >> she's pretty gutsy, anyway. >> does it work? >> no, it's not. what's interesting, positive ads just -- they're like eating a frito, they go over your head and they have no sticking power, it's negative ads that do the real work in the campaign. >> we've seen what impact they've had on newt gingrich, part of why he has said the things he said about mitt romney. let me play an example of that. >> i've made mistakes at times. >> so far, newt gingrich has admitted his mistakes or flipped on, teaming up with nancy pelosi, immigration, medicare, health care, iraq, attacking mitt romney, and more. >> i made a big mistake in the spring.