Trump is simply what he has experience doing.
Deploying really huge bombs helps his favorable polls so he will do more of that. Using nuclear weapons in Korea is next, since he is always true to his word. There is nothing that makes a President stronger than incinerating millions of people and giving the rest running sores.

The Statesmen in the State Dept. have been fired. Instead we have an Exxon drilling lease CEO in charge of Statesmanship.
Brinksmanship is more up to the power behind the throne like Steve Bannon and Alex Jones as well as Trump's military.

As long as we are at war, the legitimacy of Trump will take a cramped rear seat.