According to the NYT, citing administration officials, the president was both surprised and angered by North Korea's backing out of its initial assurances, as Pyongyang’s top nuclear negotiator stated that the country would never “trade away its nuclear weapons capability in exchange for economic aid.”
Trump reportedly approached his aides on Thursday and Friday, asking if it was wise to hold the meeting with his North Korean counterpart, and on Saturday night he reached South Korea's President Moon Jae-in to learn why Pyongyang's recent statement seemed to be at odds with the private assurances that Moon had given after the historic inter-Korean summit last month.
According to the media outlet, Trump’s decision to withdraw from the Joint Comprehensive Plan of Action (JCPOA), also known as the 2015 Iran nuclear deal, has raised the stakes for the North Korea talks.
“If he emerges with anything less than what President Barack Obama got, which in Iran included the verified shipment of 97 percent of all nuclear material out of the country, it will be hard for Mr. Trump to convince anyone other than his base that the negotiation was a success,” The New York Times suggested.
The newspaper said that Trump’s national security adviser John Bolton had advised the president to use the forthcoming summit to demand that North Korea abandon its entire nuclear program before economic sanctions are lifted.
While Seoul has favored a softer approach, built on confidence, suggesting that Pyongyang’s concessions lead to a gradual lifting of restrictions, Trump said he would not now turn to the position, which led to failure by his four predecessors.
The summit, set for June 12, was jeopardized when, on May 11, the US and South Korea kicked off a two-week annual air combat regional exercise, viewed by Pyongyang as a threat to its security.
Reacting to the drills, North Korea made a decision to call off ministerial-level talks with Seoul. The next day, Pyongyang said it might cancel the summit between Kim and Trump if Washington continues its hostile anti-Pyongyang policy. After the statement, the US diverted two B-52 bombers from flying over the peninsula, while South Korea and Japan agreed to refrain from any possible escalation.