In a speech to Pyongyang's rubber-stamp parliament on Friday, Kim said the Hanoi meeting had made him question whether Washington is "genuinely interested" in improving its relations with Pyongyang.
Trump, however, said after the Hanoi summit that North Korea committed to "totally" dismantling its main Yongbyon nuclear complex, but the lifting of the sanctions would require Pyongyang to scrap other nuclear facilities and programs, including undeclared ones.
"We still enjoy good relations and, if we think so, we can exchange letters". "I look forward to the day, which could be soon, when Nuclear Weapons and Sanctions can be removed, and then watching North Korea become one of the most successful nations of the World!"
Another signal taken from the North Korean reshuffle is that North Korea's senior diplomat to the United States, Choe Son-hui, was promoted to vice foreign minister and may inherit numerous diplomatic responsibilities formerly held by General Kim Yong-chol.
He said the Hanoi summit "raised strong questions about whether the steps we took under our strategic decision were right, and gave us a sense of caution about whether the USA is even really trying to improve the DPRK-U.S. relationship". "It was not ready to sit face-to-face and solve problems".
Moon's push to expand inter-Korean economic cooperation as a tool to accelerate the North's denuclearization has been largely obstructed by USA -led sanctions on the regime.
Kim Dong-yup, of Kyungnam University's Institute for Far Eastern Studies in South Korea, told Reuters Mr Kim's remarks signalled he would not cling to talks with United States forever and could instead look "to diversify its diplomatic relations with other countries". On Twitter, Trump described their relationship as "very good" and added that "perhaps the term excellent would be even more accurate".
President Trump, meeting with his South Korean counterpart Moon Jae-in on Friday, said sanctions on North Korea would stay in place. "But US-style dialogue of unilaterally pushing its demands doesn't fit us, and we have no interest in it", he added, referring to his second meeting with Trump in Vietnam earlier this year.
Choe was one of the three officials sanctioned by the U.S.in December over allegations of rights abuses. He said that hostility won't bring about any agreement.
"The confrontation is likely to continue as there's a low chance that the USA will change its position", Mr Shin said. In their first summit last June in Singapore, Trump and Kim issued a vague statement calling for a nuclear-free Korean Peninsula without describing when or how it would occur.
Kim's statement doesn't necessarily move the talks forward, but it does suggest he remains invested in the diplomatic process, says Mintaro Oba, a former State Department diplomat who focuses on Korea. "(North Korea) to its knees".
North Korean media touted Kim's "re-election" as chair of the State Affairs Commission as an expression of "the general will of all the Korean people" and their gratitude for Kim's "outstanding ideological and theoretical wisdom and experienced and seasoned leadership and demonstrating the politico-ideological might and tremendous power of socialist Korea on the highest level".