US President Donald Trump says "attitude" is more important than preparation as he looks to negotiate an accord with Kim Jong-un to denuclearise the Korean Peninsula.
Ahead of next week's meeting in Singapore, Trump has dangled before Kim visions of normalised relations with the United States, economic investment and even a White House visit.
Characterising the upcoming talks as a "friendly negotiation," Trump said, "I really believe that Kim Jong-un wants to do something."
Trump's comments came as he looked to reassure allies that he won't give away the store in pursuit of a legacy-defining deal with Kim, who has long sought to cast off his pariah status on the international stage.
The North has faced crippling diplomatic and economic sanctions as it has advanced development of its nuclear and ballistic missile programs.
"I don't think I have to prepare very much," Trump said. "It's about attitude. It's about willingness to get things done."
He said the talks would start a process to bring about a resolution to the nuclear issue.
"I think it's not a one-meeting deal," he said. Asked how many days he's willing to stay to talk with Kim, Trump said, "One, two, three, depending on what happens."
Still, he predicted he'll know very quickly whether Kim is serious about dealing with US demands.
"They have to de-nuke," Trump said. "If they don't denuclearise, that will not be acceptable. And we cannot take sanctions off."
Trump, who coined the term "maximum pressure" to describe US sanctions against the North, said they would be an indicator for the success or failure of the talks.
"We don't use the term anymore because we're going into a friendly negotiation," Trump said.
"Perhaps after that negotiation, I will be using it again. You'll know how well we do in the negotiation. If you hear me saying, 'We're going to use maximum pressure,' you'll know the negotiation did not do well, frankly."
Trump said it was "absolutely" possible he and Kim could sign a declaration to end the Korean War. The 1950-53 conflict ended with an armistice but not a formal peace treaty.
"I think I've been prepared for this summit for a long time, as has the other side," he said.
I"II think they've been preparing for a long time also. So this isn't a question of preparation, it's a question of whether or not people want it to happen."
Administration officials indicated that Trump actually was putting in preparation time. National Security Council spokesman Garrett Marquis noted the president met with Secretary of State Mike Pompeo and National Security Adviser John Bolton on Thursday afternoon to continue their strategic discussions ahead of the summit.
Pompeo said he was confident the president would be fully prepared and dismissed reports of division inside Trump's foreign policy team over the decision to embrace the meeting with Kim.
He called Trump's approach "fundamentally different" from prior administrations.
Since taking office, Trump has repeatedly accused his predecessors of failing to address the nuclear threat from a nation that launched its atomic program in the 1960s and began producing bomb fuel in the early 1990s.