Here's a theory:
The crisis on the Korean Peninsula was all a set up by China; working with its client dependent state North Korea.
China will get North Korea to back down in exchange for trade concessions from the US.
More importantly, the US will acquiesce to China regarding the South China Sea; as well as ultimately removing US troops and missiles from Japan and South Korea. This will all play out over time.
This will cost China very little but the US will essentially cede economic and military dominance in Asia to China. Sadly, Trump and the Progressive were going that direction anyway.
North Korean belligerence was all a set up for the benefit of China. Otherwise what does North Korea get out of its aggressive behavior. They gain nothing from war, but will get absolute protection from China after they "back down".
In other words, the Chinese and North Korea have set this whole thing up for China's benefit; all the while, Trump takes credit for reducing the North Korean nuclear threat.
Trump will say he's the winner, but in reality he will have been played.
Someday historians will ask , who lost Asia? The answer will be Donald J. Trump.