In response, South Korean President Moon Jae-in agreed to meet Kim for a summit along their shared border late next month.
'Hope Springs Eternal'
Director of National Intelligence Dan Coats said at a Senate hearing Tuesday that "hope springs eternal" but the U.S needed to learn "a lot more" about the potential talks.
A Trump administration official said the U.S. is willing to engage with North Korea but would emphasize that the demand for the complete and verifiable elimination of nuclear weapons is non-negotiable. The official, who discussed the new diplomatic possibilities on condition of anonymity, said there's a long way to go.