State Department spokeswoman Heather Nauert did not offer an explanation as to why the talks would be postponed, but two diplomatic sources told CNN that the move was clearly a signal that North Korea has not been willing to cooperate with the US‘s expectations up to this point.
The US has been looking for some sort of concession from Pyongyang — such as opening sites connected to its nuclear program for inspections — before going forward with a second summit between US President Donald Trump and Kim, the two sources said.