FILE – In this April 6, 2017, file photo, President Donald Trump and Chinese President Xi Jinping sit as they pose for photographers before a meeting at Mar-a-Lago in Palm Beach, Fla. Following his meeting with Chinese leader Xi Jinping, U.S. President Donald Trump stepped on a historical land mine when he told the Wall Street Journal that “Korea actually used to be a part of China.” (AP/RSS Photo/Alex Brandon, File)