Instead of a nuclear exchange why not a sumo wrestling match between heavyweights Trump and Kim?  The big boys in mawashi would be a sight to see and would be the biggest thing to hit pay for view since Mayweather vs. Pacquiao. Trump could host the bout at Mar-a-Lago. 
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My money would be on Trump. He's got Wrestlemania experience.  
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https://www.youtube.com/watch?v=MMKFIHRpe7I