The second meeting between Donald Trump and Kim Jong-Un is scheduled for next month. The most likely location will be Vietnam. The agenda is much the same as before: how to get North Korea to denuclearize and the United States to dismantle its sanctions regime. The question remains: which side will make the first substantial move?
The summit comes at a particular difficult time for Trump. The partial shutdown of the federal government is nearing the end of its third week, and most Americans blame the president. Pentagon chief James Mattis resigned over Trump’s insistence on withdrawing U.S. troops from

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