It could be that politics is generally a public matter. It could be misdirection, it does seem to be effective at sending the media their latest soundbite to whine about. None of the big media outlets is on his side so the tweets do allow him to reach a bunch of people easily.
He doesn't seem to have any problem firing people when they don't meet expectations so I'm inclined to believe misdirection.
Somewhere there is an old video where he says that if he is attacked he will always hit back. Personally I think Obama ragging on him at that dinner was one of the big drivers for him g to running for president.
Bottom line is that he has been a fairly effective president IMO.
Personally I think his public/political style is much different than his personal style. As an example I haven't heard of anybody who worked for him in a civilian capacity griping about his managerial style.
