U.S. News & World Report | US Calls on China to Use 'Powerful Tool' of Oil to Sway North Korea U.S. News & World Report "It's clear that with respect to oil, and a complete embargo on oil from the U.N. Security Council, that's going to be very difficult," he said. "In effect, that is directed at China alone because China supplies essentially all of North Korea's oil ... Tillerson presses China to apply oil leverage on North Korea The Latest: US urges China to use oil leverage on NKorea |