operations. sources say there was no warning for mcentee's abrupt firing. the steady march out of the white house may not be over. sources say president trump is irritated with the embattled veterans affairs secretary david shulkin. another source says he's considering energy secretary rick perry as a possible replacement. and time is said to be running out for the national security adviser as well, h.r. mcmaster. mcmaster like tillerson has been opposed to withdrawing from the iran nuclear deal but he's pushed european allies to make changes to it. mcmaster and shulkin would be the latest in a string of administration departures. president trump said tuesday he's very close to having the cabinet that he wants. joining us to talk more about this is scott lucas. he's a professor of international politics at the university of birmingham here in the uk. first of all, on tillerson, the idea that he was fired on twitter, how damaging might that be actually to donald trump? >> i don't think donald trump