involuntarily. that s the fight they have been having behind closed doors for months now. and it is reaching a climax now, which is why this is so interesting to see this particular document at this moment in time because if bob mueller decides to go forward with the subpoena, therguments laid out in the memorandum are the arguments we will be seeing in court briefs that could very quickly become a pitched constitutional battle the supreme court would have to decide. glen, to charlie s point as his lawyers are arguing, the president cannot be subpoenaed and can put an end to any doj or fbi investigation at any time for any reason. do they base that on any prior law? i don t believe they do and i think the law that s most closely related to that issue actually cuts against them, the next on case, clinton v jones case, picking up on charlie s point, i see this letter as an attempt to persuade the public that the president shouldn t be made to sit for an interview.