볼턴 美NSC 보좌관, 이번 주말 방한
Also ahead of the summit, U.S. National Security Advisor John Bolton will reportedly visit South Korea this week.
CNN on Wednesday cited two Trump administration officials in its report, but U.S. National Security Council Spokesman Garrett Marquis said they have "nothing to announce right now."
It's unclear why Bolton might visit Seoul and who he would meet.
But with officials from Pyeongyang and Washington hammering out the details of the summit, it's expected Bolton would discuss those with senior South Korean officials.
Bolton attended last year's Singapore summit and was at the table when President Trump's met with Kim Jong-un and other North Korean officials.
