North Korea is, after all, China’s bastard child.
China may dislike Kim, and Kim may even secretly fear and hate China - but China won’t abandon them, because it means they will lose their puppet buffer state against the USA and Japan.
The Chicoms have been in bed with the Norks for half a century. Hard to see any US POTUS changing that. The Chinese can just turtle up and wait out 8 years of Trump.
The Chinese would be granted/tasked with Taiwan & NK, Russia with Ukraine & Iran, and the US with Cuba & Saudi Arabia. Taiwan would be rolled back into China, but they would have to dismantle NK. Same with Russia - their responsibility would be to eliminate the mullahs.
For the USA, not only would be be granted free reign to bring Cuba up to western standards (the capital investment opportunities would be astronomical), but we'd have to force the KSA to abandon financing jihad.
In a tri-polar world of this nature, global tensions would be greatly relieved. Just eliminating the 3 most dangerous terrorist states would usher in a new period of peace.
The way the system is constructed today, it's as if regional conflict points and hair triggers were purposely designed in by the globalists.