Why Trump’s North Korea odyssey turned sour

Friday’s second anniversary of the Singapore summit between Donald Trump and Kim Jong-un saw North Korea threaten to interfere in the US presidential election. The rebuff to Washington highlights not just that Trump’s signature foreign policy initiative lies in tatters, but that Pyongyang could yet engage in new provocations before November’s ballot. To be sure, Thursday’s statement in the state-run North Korean Central News Agency was issued by a relatively low-level official in North Korea’s foreign ministry. But the comment is still notable as it appears to be the first time Pyongyang has threatened to influence or interfere in the US vote and will irk Trump. This latest episode...