Summary
South Korean presidential spokesman Yoon Young-chan said Moon will reveal the outcome of his surprise meeting with Kim on Sunday.
The meeting at a border truce village came hours after South Korea expressed relief over revived talks for a summit between Trump and Kim following a whirlwind 24 hours that saw Trump cancel the highly anticipated meeting before saying it's potentially back on.
Moon said Trump's decision left him "perplexed" and was "very regrettable".
Trump's decision to pull out of the summit with Kim came just days after he hosted Moon in a White House meeting where he openly cast doubts on the Singapore meeting but offered no support for continued inter-Korean progress, essentially ignoring the North's recent attempts to coerce the South.
In his letter to Kim, Trump objected specifically to a statement from senior North Korean diplomat Choe Son Hui.
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