Trump might well be lucky in that Kim is simply forced to the negotiating table now, during Trump's term, and it has nothing to do with Trump's strategy. But I don't agree it looks the same on the surface... I mean I can't remember world leaders outright insulting him, and using the same kind of rhetoric like "raining fire" or whatever language has been used. Up until now, it's been standard empty rhetoric, the kind of crap that the UK are currently saying in response to Russia allegedly poisoning their traitors with nerve agents in England. "We will respond with all appropriate means" and the sort of crap that makes you think of scuds and nukes, but in reality means much, much less, like booting out a few agents, or sanctions on a handful of people. What Trump has been saying in regards to Kim is totally different to what we're used to, and it might have worked... maybe Kim is worried that Trump is as crazy as he is, but obviously much much more powerful.