"[T]he President's effort to have McFarland write an internal email denying that the President had directed Flynn to discuss sanctions with Kislyak highlights the President' s concern about being associated with Flynn's conduct. The evidence does not establish that the President was trying to have McFarland lie. The President's request, however, was sufficiently irregular that McFarland—who did not know the full extent of Flynn' s communications with the President and thus could not make the representation the President wanted—felt the need to draft an internal memorandum documenting the President's request, and Eisenberg was concerned that the request would look like a in exchange for an ambassadorship."