The bromance fails

President Trump and Kim Jong-un, North Korea’s leader, abruptly ended their second summit meeting on Thursday after talks collapsed with the two leaders failing to agree on any steps toward nuclear disarmament or measures to ease tensions on the Korean Peninsula.

“Sometimes you have to walk,” Mr. Trump said at an afternoon news conference in Hanoi, the capital of Vietnam.

He said Mr. Kim had offered to dismantle the North’s most important nuclear facility if the United States lifted the harsh sanctions imposed on his nation — but would not commit to do the same for other elements of its weapons program. That, Mr. Trump said, was a dealbreaker.

“It was about the sanctions,” Mr. Trump said. “Basically they wanted the sanctions lifted in their entirety, but we couldn’t do that.”

The premature end to the negotiations leaves the unusual rapprochement between the United States and North Korea that has unfolded for most of a year at a deadlock, with the North retaining both its nuclear arsenal and facilities believed to be producing additional fissile material for warheads.

It also represents a major setback at a difficult political moment for Mr. Trump, who has long presented himself as a tough negotiator capable of bringing adversaries into a deal and had made North Korea the signature diplomatic initiative of his presidency.