works. it could be possible that the president ultimately does sit down with the special counsel. but the question is if the lawyers say no, you can't do this, what will mueller do? what will be his next course of action? what can he do? that's still unclear. >> subpoena. he can subpoena the president. and ultimately that will be a judge to decide. >> the president is plead the fifth. all these things could happen. thanks so much. i want to bring in legal and national security analyst and cnn intelligence and security analyst. let's start with the president's lawyers now saying the special counsel hasn't met the legal standard for the approximate the to sit down with an interview. we won't go into the history, but it basically requires prosecutors to prove that they have an important reason to talk to the president, important to the ongoing grand jury investigation and they must demonstrate why the evidence is