the cause of the problem remains donald trump. joining now our resident expert in all things foreign policy andrea mitchell. nbc news chief foreign affairs. anchor of msnbc's ""andrea mitchell reports."" the writing on the wall was there for a while on this so not surprising. but still sudden. >> very sudden indeed. to be fired on twitter, an experience that rex tillerson and dan coates and those now three national security prominent officials had experienced is not only humiliating but in this case there was immediate push back from john bolton in realtime tweeting, texting to our colleagues he had resigned and not been fired. so there was a lot of contention there. and shortly after, an hour or so later the briefing he was supposed to attend in the briefing room where the secretary of state was clearly triumphant over months of