Every stakeholder has had something to say about Donald Trump’s decision to meet with Kim Jong-un — except for one in particular. The South Koreans announced the invitation from the North Korean leader; Trump and his administration made a public show of accepting it; even Russia and China have offered public encouragement. The American media talks continually about it, at least when they take a break from coverage of the more pressing and existential issue of Stormy Daniels.So who’s the party pooper? Despite rarely missing a chance to comment on events in the region, the Kim regime itself is...