However, it would allow Kim and Trump to meet without travelling far from either of their respective security forces or to be seen kowtowing in an "enemy" capital.
Senior administration officials had to dissuade Trump from meeting Kim in April and convince him to wait until May, after the leaders of North and South Korea hold their own summit.
Mr Trump told a campaign rally for a Republican congressional candidate in western Pennsylvania that he believed North Korea wanted to make peace, saying "I think it's time".
North Korean media has reported on the South Korean visit to the U.S., but not on details of the talks, according to Reuters.
Watch the clip above, via Comedy Central.
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South Korea's government will also decide on whether to join the Comprehensive and Progressive Trans-Pacific Partnership within the first half of this year, Kim said at the meeting. A South Korean spokesman said, "I feel they're approaching this matter with caution and they need time to organize their stance".
He welcomed the North's move to hold talks on the premise of denuclearization, but stressed that it must also take concrete action. "North Korea made several promises and we hope that they would stick to those promises and if so the meeting will go on as planned".
China may not even want a complete dismantlement of North Korea's nuclear weapons program, but simply to contain the situation before it gets worse.
On Saturday, Trump said his talks with Kim could end with no agreement or they could be "the greatest deal for the world". It is the first title from CJ HK Entertainment, a joint venture between South Korea's media and entertainment company CJ E&M and the Vietnamese studio HK Film. For the North Korean leader, this is recognition he has long sought. He had met earlier with the North Korean leader in Pyongyang.
His "intentions are to use that weapon for nuclear blackmail, and then, to, quote, you know, "reunify" the peninsula under the red banner", McMaster said in a representative expression of this view in December. South Korea's national security adviser, Chung Eui-yong, who delivered the invitation to Trump after a visit by his delegation to Pyongyang, said Kim had offered to put Pyongyang's nuclear and missile program on the table.
"I am delighted that South Korea's efforts have made great progress in the overall Korean Peninsula situation and that close dialogue between NK and the USA has been achieved". The factory complex provided jobs to thousands of North Koreans.