President Donald Trump held separate telephone conversations Monday with Chinese President Xi Jinping and Japanese Prime Minister Shinzo Abe, continuing to discuss the threat posed by the regime of North Korean dictator Kim Jong Un, which has ramped up its military provocations in recent weeks.The White House, which typically releases readouts of phone calls between the president and foreign leaders, had not yet done so as of early Monday morning.China’s state run television network reported Monday that Xi called on the U.S.