The Military-Industrial Complex will try to assassinate Trump for allowing this to happen. Mark my words.
Trump has been sinking his own ship by doing & saying illegal crap almost daily. Of course there are many on all sides who don't want to see Kim Jong Un end war.
Kim Jong Un was educated in Switzerland & more aligned with Western Values than his predecessors. Since becoming leader of NK he had to act strong to prevent multiple kill or be killed coups by family & military. Now that he has established firm leadership control of NK he can steer that ship. The loss of 200 North Korean nuclear scientists, researchers, workers in mountain collapse & worry it could trigger a radiation leak, has halted NK's nuclear ambitions. This has allowed KJU to explore his own peace diplomacy with the west that he loves.
Kim Jong Il and his third son Kim Jong Un during his youth.