moves into other areas, you can't predict. >> this investigation started purely as russian interference in the election. trees of documents, stolen e-mails, et cetera. that expanded to a number of issues, one, the possibility of collusion between trump advisers and the russians. and now you have the question of donald trump's possible interference if that continuing investigation. and in addition to that, we know that also subject of the investigation is any financial entanglements or his advisers had and whether that leads you down the path -- we're not there yet -- but whether that leads investigators down the path as to russia having this famous compromise, compromising material about the president. so open questions, but questions to be pursued. >> is it likely that coyle will ta in advance talk to mueller? >> yes, i think so. and it's entirely appropriate