Pompeo said a US-led sanctions pressure campaign on Pyongyang would not be eased until North Korea gives up nuclear weapons. He's said he will succeed where his predecessors failed in persuading North Korea to give up its ambitions to become a nuclear superpower. "If we can get the two to agree that that's the end state we're working for, we will have a good day".
Mr Trump later denied the U.S. would follow the "Libyan model" if an agreement was reached with North Korea.
US Secretary of State Mike Pompeo said on Wednesday America is prepared to walk away from nuclear negotiations with North Korea if the summit heads in the wrong direction. "If the right deal is not on the table, we will respectfully walk away".
Pompeo said he made clear to Kim the U.S. view of what steps Pyongyang needs to take, including verification work, in order to demonstrate "real denuclearization".
Mr Trump stunned the world when he confirmed that he and North Korean leader Kim Jong-un would be meeting for talks following a agreement apparently brokered by South Korean President Moon Jae-in.More news: 'Sonic attack' on American consulate in China leaves staffer with brain inujury
Even if the summit seems unlikely at the moment, it will probably be held on June 12th in Singapore as both sides have too much to lose if the meeting is canceled.
Pompeo, who was director of the Central Intelligence Agency before becoming secretary of state in April when Trump fired Rex Tillerson, has met twice with Kim in Pyongyang. "We are not going to provide economic relief until some time as we have an irreversible set of actions - not words, not commitments - undertaken by the North Korean regime".
The spat between the U.S. and North Korea over what denuclearisation means raised questions about how clear Pompeo had been in his two meetings with Kim at Easter and earlier this month. He said they had discussed their mutual goals for the talks.
North Korea cancelled high-level talks with South Korea, saying the South's joint military exercises with the USA - which it had previously said it would tolerate - were a "provocation".
In the fullest account to date of the Pompeo-Kim talks, the secretary of state recounted the North Korean leader's demands.More news: The new Google News app is now widely available
The New York Times reported on Sunday that Mr Trump was asking aides and advisers whether the meeting should go ahead.
Kim's paranoia about losing power is believed to have played a role in the assassination of his older half-brother Kim Jong Nam early previous year in a Malaysian airport.
Journalists from the United States, the UK, Russia, China, and South Korea gathered in Wonsan, North Korea, on Wednesday before being told to ship out to the test site.
A failed summit would damage Trump's self-promoted image as a master deal-maker.More news: Mark Zuckerberg to appear before European Parliament