Asked if he would meet Kim in Singapore, he said he thought the North Korean leader had "bigger things to worry about", but added that every time he'd met with Kim, it had been a surprise. The US side is expected to include State Secretary Mike Pompeo, national security adviser John Bolton and chief of staff John F. Kelly.
Basketball star and improbable North Korean envoy Dennis Rodman broke down in tears live on television Tuesday as he recounted the hostility he faced for meeting dictator Kim Jong-un.
The foreign minister posted a selfie of him and a smiling Kim wearing his trademark dark Mao suit on Facebook.
Trump's early exit will be his second from a summit in just a few days. Trump also said the US would stop "war games" military exercises with South Korea, saying they are too expensive and "provocative".
"North Korea's increased dialogue with other countries is a positive step, but before the world gets too excited they should remember that Kim Jong-un still presides over perhaps the most repressive system in the world", he said.
"North Korea has previously confirmed to us its willingness to denuclearise and we are eager to see if those words prove honest", he said. He received a waiver to visit the White House to meet with President Trump in the run-up to the Singapore summit.
Also, the White House said in a press release that US President Donald Trump and South Korean President Moon Jae-in discussed by phone prior to the Singapore summit maintaining close coordination on North Korea.
Joint armed forces of from the Chinese police and the People's Liberation Army have enforced tight security in the border area of Dandong in northeastern China's Liaoning province, that lies across from North Pyongan province, the source told RFA's Korean Service. He's pushing for "complete denuclearisation, " which includes removing the U.S. nuclear umbrella in Northeast Asia that protects allies South Korea and Japan.
Instead, they hoped the president - who billed himself as a dealmaker long before he entered politics - could achieve enough in Singapore to frame the meeting as a win that helps bolster the president against critics and supports his party going into the midterm elections.
Reports describing hard pre-summit negotiations at the working level about the contents of a joint communique-even on the most basic question, like what the term "denuclearization" actually means-offer evidence that the result of the Trump-Kim meeting will be modest.
China is also hoping that the summit leads to an easing of the worldwide sanctions that have been imposed on North Korea.
SHAPIRO: We've heard American officials talk a lot about their desire for a denuclearized North Korea.
Pompeo said "any suggestion that the United States somehow lacks the technical expertise across government, or lacks it on the ground here in Singapore, is mistaken".
Later, during his news conference, Trump said Warmbier's death contributed to the summit taking place.
Trump has said he'll know within minutes whether a deal can be made. He studied in Switzerland at an global school in the late 1990s before returning to North Korea around 2000. The outcome, of course, would still be that US goal of complete denuclearization.
For Trump, Singapore represents a golden opportunity to overshadow the negative headlines he generated from a contentious G-7 summit.
The sitting leaders of North Korea and the United States have never met before.
Trump's goal is "ridding the USA and the world of threats posed by North Korea's weapons of mass destruction and ballistic missile programmes", Secretary of State Mike Pompeo told reporters on June 7.