Kim sharply raised tensions with nuclear and missile tests last year, but suddenly reached out to South Korea and the United States this year with a vague nuclear disarmament pledge.
Earlier on Friday, while meeting with his South Korean counterpart Moon Jae-in, Trump discussed his intention to hold a second U.S. -DPRK summit, and restated with Moon a common commitment to work closely together on making it happen.
U.S. officials insist on the complete, verified and irreversible denuclearisation of the Korean Peninsula before sanctions are lifted. And that, he said, can be done through global climate organizations like the Green Climate Fund and the Global Green Growth Institute, and he welcomed the adoption of the "Buenos Aires Update", part of the G20 nations' efforts to achieve sustainable development.
Mr Trump and Mr Kim held a historic summit in Singapore earlier this year, signing a vaguely worded deal on denuclearisation. Subsequent nuclear diplomacy hasn't made headway since the US-North Korea summit in June.
A USA think tank said last month it had identified at least 13 of an estimated 20 active, undeclared missile bases inside North Korea, underscoring the challenge for American negotiators hoping to persuade Kim to give up his weapons programs. Moon and his wife, Kim Jung-sook, arrived in the South Pacific nation late Sunday after attending the Group of 20 Nations summit in Argentina. But differences have emerged between Washington and Seoul on how to proceed with Kim, as the dovish Moon has long favoured engagement with the North.
Huawei CFO arrested for violating USA sanctions on Iran: Canadian media
The Wall Street Journal reported the U.S. government was trying to persuade companies in allied countries to avoid Huawei. "She is sought for extradition by the United States , and a bail hearing has been set for Friday".
"We remain unchanged in our stance that (Kim's visit) will be possible and necessary before the end of this year", Baik Tae-hyun, a foreign ministry spokesman, said in a press briefing.
In this undated photo released Monday, Dec. 3, 2018, by the North Korean government, North Korean leader Kim Jong Un, center, visits the Wonsan Shoes Factory in Gangwon, North Korea. But prospects of a fourth Moon-Kim meeting have recently dimmed, with negotiations on denuclearizing the North grinding to a halt.
President Moon Jae-in said more important than the timing of the visit is that it would accelerate the denuclearization of the Korean Peninsula and give impetus to talks between Kim and U.S. President Donald Trump.
Moon will also meet with Opposition leader Simon Bridges today and Korean-born National MP Melissa Lee.