president to do something, to testify about obstruction. to testify and perhaps create a perjury situation. couple of questions. if, in fact, as you suggest, mr. mueller is an inferior employee, does an inferior employee of the department of justice have the power constitutionally to force his boss, the president of the united states, to appear before a grand jury or to appear in person for an interview? what do you think? >> i would say no. an inferior officer does not have the legal right or the constitutional right to question a president over exercising his constitutional authority. in, for example, firing james comey, the fbi director, and moreover as to the issue of