North Korean leader Kim Jong Un received a personal letter of "excellent content" from US President Donald Trump, the country's state media said Sunday, amid a nuclear deadlock between Pyongyang and Washington. Talks have been stalled since the collapse of a second summit between the two leaders in February after they failed to agree on what the North would be willing to give up in exchange for sanctions relief. The two sides have blamed each other for the breakdown but both have expressed a willingness to meet again, with Trump saying earlier this month that he had received a "beautiful letter" from Kim.