U.S. President Donald Trump listens to South Korean President Moon Jae-in during a joint news conference at the Blue House in Seoul, South Korea, Nov. 7, 2017 (AP photo Andrew Harnik).

North Korea looms large on U.S. President Donald Trump’s agenda during his nearly two weeks in Asia. Compared to discussions on trade and economics, and Trump’s handling of his meeting with Chinese President Xi Jinping and a now-likely one with Russian President Vladimir Putin, North Korea’s nuclear and missile threats have the gravest consequence for regional and global security. With Trump, the North Korea crisis appears to be playing out on several, sometimes-contradictory levels. His national security officials hold out proposals for diplomatic contact, or military options short of full-scale war, while the president opts for brash messages to intimidate […]