When asked whether the message concerned the release of three American hostages in North Korea, as had been speculated before the South's delegation arrived in the US, the source denied it, saying that the message is more "comprehensive in content". Trump said he demands "significant changes" in the Iran deal itself and not simply the addition of a supplemental agreement between the USA and the European countries, according to the officials. He said that, in delivering the invitation to Trump orally, it was possible that the South Korean envoys may not necessarily have accurately conveyed to the USA leader what Kim said, "let alone what he meant", without a written record of the invitation. "If this is carried out, Western countries trading with the U.S. and many steelmakers and aluminum producers will suffer significant damage".
Secretary of State Rex Tillerson says the United States has "not heard anything directly back from North Korea" since President Donald Trump accepted leader Kim Jong Un's invitation for a meeting. In the past, he noted, "the process once the North Koreans said, 'Hey, we're willing to do this stuff, ' has been abysmal".
A South Korean delegation that visited North Korea last week said North Korean leader Kim Jong-un expressed a wish to meet Trump and South Korea's president to discuss denuclearization. In 1994, President Bill Clinton agreed to provide North Korea with $4 billion in energy aid in exchange for...wait for it...denuclearization. "I would say, "remain patient".
"We look forward to the smooth [talks between the two Koreas] and dialogue between North Korea and the U.S.", Xi was quoted as saying.
China has recently expressed optimism that an agreement would be reached, likely hoping for a deal which includes the U.S. decreasing its military presence in the region in exchange for denuclearisation.
It made no mention of any summit plans, let alone any conditions or statements on whether Kim is seriously mulling abandoning his nuclear weapons.
Unfortunately, at least in the short term, the US and Trump have much more to lose from failed talks than Kim does.
"It could be the key that unlocks the door to 2020 (for Trump)", said Duerr.
"We have not seen nor received an official response from the North Korean regime regarding the North Korea-US summit", Ministry of Unification spokesman Baik Tae Hyun told a regular news conference.
North Korea's state media is yet to report on the developments and the regime has not so far respond officially to Trump's acceptance of the invitation to talks.
Mongolia's capital city, Ulaanbaatar, has been the site of past sensitive negotiations with North Koreans, maintains friendly relations with both sides, and has little in the way of political baggage.