russians to interfere in the election. the trump campaign, according to robert mueller, was receptive to those efforts. and this is the action that the president took to impede with that investigation. it may be the case that the cover-up is worse than the crime, but that's precisely why they want to hear from robert mueller. >> we know the democrats on the judiciary committee have been going through the mock rehearsals, these drills. we've now learned that norm eisen, a counsel, a former ethics czar in the obama white house, former cnn contributor, senior fellow at brookings, that he's been playing robert mueller in these mock rehearsals. >> right. norm eisen is one of the sharpest guys in town. i think he would have an enpssi ppsych ped --encyclopedic memory. he likes to explain things. the big question is whether or