"To this end, I ask the people to send their continued support for South-North Korean dialogue, including the military, Red Cross and sports talks that will begin this week", he said.
On Monday, crowds of journalists and curious locals gathered around the hotels where Trump and Kim are staying, while most other Singaporeans went about their daily routines - going to and from work, shopping and jogging past security checkpoints and police stationed with shotguns and rifles. Bloomberg first reported the reason behind the schedule change. But official says meeting is meant to be "start of a relationship" and there will more to come between both sides if things go well.
"Great to be in Singapore, excitement in the air!" he tweeted on Monday.
One analyst told Al Jazeera Trump will seek to promote his image as a deal-maker.
"I can only say this", Pompeo said.
The US leader has whipsawed on expectations for the meeting, signalling that it could be the beginning of a "process" of several meetings, only to call it a "one-time shot" for peace as he embarked for Singapore and saying he would know "within the first minute" whether an agreement would be possible. "We will be fine!"
He said previous American administrations have been fooled by North Korea but the Trump Administration has got experts on non-proliferation and Weapons of Mass Destruction on the ground to verify Pyongyang's willingness to denuclearise. They also updated North Koreans on Kim's meetings before the main event with President Trump.
While advisers say Trump has been reviewing briefing materials, the president insists his gut instincts will matter most when he gets in the room with Kim.
Secretary of State Mike Pompeo said the preparatory talks between the two nations had moving quite rapidly.
President Donald Trump plans to depart early from his unprecedented summit with Kim Jong Un, the White House said Monday, declaring that nuclear talks with North Korea have moved "more quickly than expected".
Trump declares the North Korea nuclear threat is over
A North Korean aide wearing latex gloves reportedly inspected and wiped the pen intended for Kim , which he didn't end up using . But conservatives in South Korea slammed the summit, saying it failed to curb North Korea's nuclear ambitions.
But Pompeo's comments sought to reaffirm the high benchmark the USA is setting for Trump and Kim to reach an agreement.
It was a far cry from a year ago when Trump threatened North Korea with "fire and fury" and mocked Kim as "little rocket man", and Kim denounced the United States president as the "mentally deranged USA dotard".
Mr Trump has also raised the possibility of further summits and an agreement ending the Korean War by replacing the armistice signed in 1953 with a peace treaty.
Washington is eager to see if the North's pledges were "sincere", Pompeo said, adding: "The United States has been fooled before".
The political consequences of the summit have not been lost on Trump or his allies. "He has that opportunity and he won't have that opportunity again", US President Donald Trump said Saturday before heading for Singapore.
While no agenda has been officially announced, it is being speculated that bilateral relations between the two nations might also come up, as the USA, as well as the United Nations, has put additional sanctions on North Korea in recent times following Kim Jong Un's repeated missile tests. "The US position remains clear and unchanged".
Kim said through an interpreter: "It wasn't easy for us to come here".
Trump "is an incredibly instinctive, intuitive, off-the-cuff, winging-it negotiator", said Marty Latz, the author of the forthcoming book "The Real Trump Deal".
"I told them today, take your time. He just goes and he does it". "We expect a fierce tug-of-war to continue between the two sides until tomorrow's summit ends, but we also expect some good outcome". If that's the approach Trump is instinctively drawn to, United States officials and experts worry Trump could make the concession in his first meeting with Kim. Along the way, he offered "that things can work out very nicely" with North Korea.
North Korean state media described the departure Kim received as a full-fledged "ceremony". Will they simply shake hands? On the day before the meeting, weeks of preparation appeared to pick up in pace, with USA and North Korean officials meeting throughout Monday at a Singapore hotel. And how will Trump react if he does?
Trump advisers cast his actions as a show of strength before the Kim meeting.