>> well, ultimately we learned through history that it takes the power of the purse strings that congress has the authority when it comes to appropriations to assert itself from foreign policy. we learned the hard way after decades of debate over the war in vietnam. but first and foremost, this congress, house and senate, have to reach the point where we understand our constitutional authority and responsibility. i haven't seen that in a long time. and with this president, we need to do it more than ever. >> does the turkish phone call make you think the president is compromisable? >> yes, i do. i have to tell you that whether he is talking to putin or the turkish president, the autocrats have him enthrawled. after a conversation he'll make snap judgements and avoid the best advice he could from people like general mattis. that is the height of irresponsibility. there are thousands of kurds risking their lives to help us defeat isis who are now in jeopardy because of this impulsive decision by donald trump. >> do you question his fitness for office?