A second meeting between U.S. President Donald Trump and North Korean leader Kim Jong Un is being planned, the White House said Monday. Such a summit, some experts say, could help break the current impasse in denuclearization talks and lay the groundwork for what ultimately may be the only way forward: arms control measures and the recognition of Pyongyang as a de facto nuclear power.

White House press secretary Sarah Huckabee Sanders told a televised news conference that Trump had received a "very warm, very positive letter" from Kim, the primary purpose of which was to ask for the second meeting, which she said the administration was open to and "in the process of coordinating."

Asked if the possible meeting might take place in Washington this time, Sanders offered no concrete details and said that the White House would not release the full letter without Kim's permission, but added that the talks are "certainly something that we want to take place" and that the administration will continue to work on making it happen.