Take the Spotlight Off North Korea

(Bloomberg Opinion) -- At the Demilitarized Zone between North and South Korea on Sunday, U.S. President Donald Trump put himself just where he likes to be: at center stage, showcasing his supposedly unmatched negotiating skills without net or supporting cast. The U.S. would have a better chance of reaching a lasting deal with Pyongyang if he now withdrew to the wings.The kind of personal diplomacy Trump favors can have its place. North Korean dictator Kim Jong Un cut off negotiations (and perha