After years of isolation on the global stage, the North Korean leader Kim Jong-un has emerged from an heir apparent who orchestrated execution of his uncle and assassination of his half-brother. He is becoming a skillful diplomat on the spotlight. The world witnesses his transformation from a spendthrift on hydrogen bomb and intercontinental ballistic missile testing to a connoisseur of political games. In due process, Trump, more than twice Kim’s 34 years of age, has called