irregular, informal channel of u.s. policy-making and by the withholding of vital security assistance. they're using it for personal reasons, to exploit unfounded conspiracy theorys to try to win an election. >> right. it happens all the time, going outside, bringing in experts that can help advance what the government is trying to do. but in this case it's really striking taylor also lays out who was working in what camp. he shows how the secretary of state, the secretary of defense, the head of the cia and the national security adviser john bolton were trying to let go of the military aid. ukraine has always been at the front line of the tension between the united states and russia, which was amped up like crazy five or six years ago -- five years ago, excuse my math in the morning, when russia