"I'm very optimistic that we will have a successful outcome from our meetings tomorrow", he said.
He also called a unilateral halt to "very provocative" United States military exercises with South Korea, claiming they were "very expensive" and the USA pays for "a big majority of them".
The war games are very expensive, we pay for a big majority of them.
"However we think that it is crucial to pursue various solutions for better dialogue".
However, it now appears that the U.S.is confident tings are going smoothly.
Moon has made great efforts playing the role of mediator to bring the cold war foes back to dialogue. The president's comments and face-to-face meeting with Kim have sparked criticism that he could legitimize or embolden North Korea's regime.
Trump also stressed that he believes he has "helped" the estimated 120,000 people in North Korean prison camps by starting the process of potentially normalizing relations with Pyongyang. "Will the world embrace this change?" a male narrator can be heard asking the audience.
North Korea regularly calls the military exercises provocative preparations for a northward invasion, and numerous scariest standoffs in recent years on the Korean Peninsula have happened when the drills were being staged. Trump grasped Kim's right arm as they shook, and then, later, took hold of Kim's left arm as they turned to face the cameras and the world, both their expressions momentarily deadening before they turned to face each other again, and smiled.
Washington is eager to see if the North's pledges were "sincere", Pompeo said, adding: "The US has been fooled before".
The meeting was the first time a sitting USA president has met North Korea's leader.
Mr Kim and Mr Trump arrived in Singapore on Sunday for what will be the first-ever summit, set to held on Tuesday (June 12), between a leader of North Korea and a sitting U.S. president.
Many lawmakers from both parties, while unready to declare the summit a diplomatic victory or defeat, remained skeptical the USA could successfully negotiate a deal toward peace with Kim - but are letting the process play out. Trump defended his decision by emphasizing the high cost of joint military exercises.
Mr. Trump's announcement that the joint exercises would end appeared to catch some USA defense officials off-guard.
Kim said he wanted to express his gratitude to President Trump for making the meeting happen.
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