underscore the president's own executive power or even unfamiliar with the separation of powers because of the way he would demand the doj do x, y or z? >> i think he is flexing his executive powers very aggressively. he's doing it intentionally, i think he's testing the limits of how far he can go to push back against what doj is doing. and what's important is he's doing this in public, part of his effort isn't simply just to restrain doj has an institution, it's to undermine the credibility with the public at the same time so that the doj backs away from what it's doing with the president. >> house intelligence committee chairman devin nunes has been pushing for information on this confidential source, the president and the white house