all of a sudden, they wanted to talk about how they weren't immigrants. that shows they have real vulnerability on that. >> i want to take a look at one of the rougher patches of the immigration section of that discussion tonight where mitt romney wasn't really sure what is in one of his ads about newt gingrich. let's listen to that. >> saying that speaker gingrich calls spanish, quote, the language of the ghetto. what do you mean by that? >> i haven't seen the ad. did he say that? >> as much as governor romney doesn't particularly like my use of language, i found his use of language and his deliberate distortion equally offensive. >> okay. and just because we don't get to see this very often in debates, cnn did a check about this ad. it really is a romney ad. i was doing a check, too, while that happened. now let's run wolf blitzer demonstrating to mitt romney that this really is his ad.