branch of government, the courts, to resolve differences like this but you have not tried to go to the courts to compel these witnesses to testify. if something as grave and momentous as impeachment, why not. >> well first of all we have gone to the courts -- >> not on this issue. >> we have gone to the courts started with mcgahn and various other people. >> but not on ukraine and impeachment inquiry. >> and what we have found is that the courts take months and months. but we don't need to go to the courts. the article 1 power is the sole power to try impeachment and should not be and has never been dependent on the courts. the president and the executive branch are duty-bound to cooperate with congress in any legitimate inquiry and the president's absolute failure to do so and defiance is an act against the separation of powers and against the constitutional scheme and shouldn't require anything from the courts.