Donald Trump, the President of the US, declared to cancel the planned meeting with Kim Jong-un, the leader of North Korea.
The New York Times: Trump Pulls Out of North Korea Summit Meeting With Kim Jong-un
His statement was sent with a personal letter to Kim. In the message, Trump seems to have chosen words deliberately to express his regret. Perhaps he is not willing to break the relationship with Kim completely.
On the other hand, North Korea is still ready to accept the meeting with the US, according to the media. Kim Jong-un had made comments which were somewhat provocative to the US. It is possible that North Korea did not expect the cancelation of the meeting committed by Trump.
CNN: North Korea says it's still willing to meet Trump after US President cancels summit
Now, it is uncertain whether the summit will be realized. I believe Trump wants to do something about this issue. If North Korea accepts a deal suggested by the US, it will be counted as a great achievement of the Trump administration. Then, the US may soften the attitude to North Korea soon, for the second chance.