President Donald Trump has agreed to meet with North Korean leader Kim Jong Un by this May, South Korea's national adviser announced at the White House Thursday evening. He had briefed the president on a message from Kim earlier in the day. The South Korean envoy said that in his recent talks with Kim, the North Korean leader had expressed an eagerness to meet with Trump as soon as possible. He said that Kim had said he was committed to denuclearization, suspending more missile tests, and had agreed that U.S.-South Korean joint military exercises the North objects to must continue....