been a constant process of negotiation and refinement. >> okay. literally while we were just playing that sound bite from adam schiff, i was just handed some breaking news on this very subject. you just heard there how intelligence committee chairman adam schiff explained it as of this afternoon, in terms of these ongoing negotiations about whether or not mueller would be accompanied by his deputy, by his fbi chief of staff aaron zebley, and under what circumstances. well, nbc news is now reporting, according to a house intelligence committee staffer, that we now have some clarity on this. the intelligence committee, again, is going to be the second committee that mueller testifies to tomorrow, and according to nbc news, an agreement has now been reached that aaron zebley, described today as deputy special counsel, aaron zebley, who was mueller's chief of staff when he was fbi director, aaron zebley at the intelligence committee testimony, zebley will be sworn in. so mueller will be sworn in for his testimony and zebley will be sworn in to testify as well.