there is testimony by ambassador volker to this extent that what he wants was simply public information to damage joe biden. he didn't care whether joe biden was found guilty or exonerated. >> professor feldman, do you agree? >> my emphasis would be on the fact that the president held up aid to an ally that is fighting a war in direct contravention of the unanimous recommendation of the national security community. that seems to have placed his own interests in personal advantage ahead of the interests. >> and a bill passed by congress. professor gerhart. >> i agree with what my colleagues instead and i would add that i'm concerned about the president's obstruction of congress. the structure of this inquiry, refusal to comply with the number of subpoenas ordering many high-level officials and the government not to comply with subpoenas and ordering the entire executive branch not to cooperate with congress. it's useful to remember the constitution has the house has