North Korea is playing Trump, just as it did with past presidents

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In calling into question White House national security advisor John Bolton’s take-it-or-leave-it approach to North Korea’s nuclear disarmament, Robert Carlin ignores the commitment Kim Jong Un made in the Singapore summit joint statement, namely the “firm and unwavering commitment to complete denuclearization of the Korean peninsula.”
Since the Singapore summit last June, U.S. intelligence reported the continuing production of nuclear weapons materials, weapons and delivery systems. Contrary to Carlin’s presumption, Trump’s pragmatism has not proved to be superior to efforts by prior U.S. administrations nor those of South Korea and the International Atomic Energy Agency, which repeatedly negotiated nuclear elimination deals that Pyongyang violated....

https://www.latimes.com/opinion/readersreact/la-ol-le-north-korea-trump-nuclear-weapons-20190407-story.html