US National Security Adviser Jake Sullivan’s trip to Beijing was about managing tension and that’s the best that can be hoped for, says this foreign affairs columnist. NEW YORK: Last week, US National Security Adviser Jake Sullivan travelled to China for a multi-day trip in an attempt to keep relations between Washington and Beijing on a somewhat even-keel as the United States prepares for a political transition in several months’ time. The trip was notable in several respects. It was the first