U.S. President Donald Trump called Sunday on North Korean leader Kim Jong Un to hold a summit "soon," as denuclearization negotiations between the two nations have shown few signs of moving forward.Pyongyang quickly responded to Trump's remarks on Monday, urging the United States to abandon its "hostile policy" against North Korea if it wants to continue bilateral talks.Earlier Monday, meanwhile, North Korean First Vice Foreign Minister Choe Son Hui, a close aide to Kim, left Pyongyang for Russia, apparently to exchange views with Russian officials on how to expedite negotiations with the U…READ FULL ARTICLE