Reminder that what he promised is awful
Reminder that he is about as interested in real solutions as a crocodile is in ballet
If he actually manages to denuclearize North Korea, or just manages to get the Koreas to make peace, he should get the Nobel, obviously.
But let's not pretend he succeeded because of good intentions or intelligent politics. He succeeded through a combination of luck (North Korea's nuclear testing grounds physically collapsing) and strongarm tactics (Kim realizing his counterpart is a madman who might just be crazy enough to opt for a nuclear response... or even a pre-emptive strike... simply because he doesn't give a shit).
Don't pretend for a moment Trump is even marginally interested in anything else than himself. Literally everything he does is an expression of his self-aggrandizing. He never learned any other way, because why should he? In his line of work, you win by destroying the other guy through means fair but very mostly foul.
He shits on society, culture, the environment, international politics and even the people he meets personally. The guy is a complete ass, and I should very much like to hear the stories of the people who did the DIPLOMATIC work surrounding the North Korea deal. I strongly suspect he was less an instigator, more a prop.
"You have to negotiate. It's all we can do to control him. He's mad. You have no idea what he's capable of."