controversy dogging president obama. did top aides, including the vice president joe biden warn him about it beforehand? new information coming in. i m wolf blitzer. you re in the situation room. our national political correspondent jim acosta is following it for us. reporter: it sounded like he was referring to mitt romney as mr. burns, the villain from the simpsons who once said release the hounds. that s because in the race for the alpha dog, the fangs are out. rick santorum doesn t need anybody to tell him who let the dogs out. i think it s interesting you re asking that question about governor romney and his attack dogs.connect 1200 he has an opportunity tomorrow at this convention ironically he spoke to them four years ago this week, wolf, when he was pulling out of the presidential race. let s listen to what he says. i stand for conservative prim pes, i ll fight alongside you for all the things we believe it in, and one of the things we believe is we ca