Aljazeera.com | US urges China to use oil leverage on North Korea Aljazeera.com US Secretary of State Rex Tillerson has said it is "very difficult" to get China to agree to an oil embargo on North Korea, but he is hopeful that the "great country" will decide to use its "powerful tool" of oil supplies to persuade Pyongyang to ... Tillerson presses China to apply oil leverage on North Korea The Latest: US urges China to use oil leverage on NKorea US Calls on China to Use 'Powerful Tool' of Oil to Sway North Korea |