>> right. and it's not -- it doesn't even require an impeachment investigation. remember, congress has very broad jurisdiction to investigate whatever they want. they could be investigating campaign fninance violations. congress has the power to give immunity to people that they want, who are citing their fifth amendment rights. congress generally refrains from doing so if it's going to interfere with a criminal investigation. but here, that criminal investigation is over. there's no risk of a case against michael cohen because he's already pleaded guilty. so if jerry nadler, woo was the democrat who would be chairman of the judiciary committee, says we want to investigate this, and if his colleagues vote to give cohen immunity, he has to testify before congress. and if he doesn't, he goes to jail for contempt. same principle applies if robert