S. Korea's presidential official discusses Moon-Trump summit agenda with U.S. officials

A senior official at South Korea's National Security Office has been holding talks on the upcoming Moon-Trump summit with his U.S. counterpart Charles Kupperman.After wrapping up the meeting at the White House on Monday,... Kim Hyun-chong, would not be drawn on what was discussed.But it's likely they worked on the agenda for the April 11th summit.Kim may have also have sought ways to mediate between North Korea and the U.S. on denuclearization.The North is demanding a step-by-step approach;... the U.S... a full-package denuclearization deal.Kim is expected to further discuss North Korea with members of Congress before leaving on Wednesday.