I'm reasonably sure Trump is taking advice from the various psychopaths that surround him in the White House, alternated with some "suggestions" from certain rich "allies" in the Middle East.
There are 3 options: Trump tries to blow up the world, the status quo continues "forever," and Trump gets a humiliating defeat which he calls The Most Perfect Beautiful Deal Ever Made and much of our press, especially his Foxy Friends, play along.