"I feel that Kim Jong Un wants to do something great for his people and he has that opportunity and he won't have that opportunity again", Trump said at a press briefing before leaving the G-7 meeting in Quebec.
The limousine of North Korean leader Kim Jong Un, left, leaves the Istana, or Presidential Palace, in Singapore on Sunday, June 10, 2018, after his meeting with Singapore Prime Minister Lee Hsien Loong. He describes the summit as "produced by Kim, directed by (South Korean President Moon Jae-in), and inspired by Trump".
After his remarks, Trump headed to the Canadian air base at Bagotville by helicopter before boarding Air Force One and setting off for Singapore, where he was scheduled to arrive late Sunday.
North Koreans understand that their government regularly lies to them and feeds them propaganda that contradicts their current situation, but few understand the true discrepancy between their country and the outside world, according to North Korean defector Kim Young-il.
He also ridiculed Kim in a speech at the UN General Assembly as "Little Rocket Man" who in turn called Trump a "dotard".
The summit is a plus for Singapore, he added. However, others reported that the Air China Boeing 747 took off before the leader's jet did by an hour or two as a security measure to avoid making his mode of transportation known.
"To all Americans and the rest of the world I'm honored to call President Trump a friend".
Trump hopes the landmark talks will kick-start a process that eventually see Kim give up his nuclear weapons in an irreversible manner that can be verified internationally.
The meeting will take place in Singapore at the Capella Hotel on Sentosa, and the hope is that the landmark talks - the first between a North Korean leader and a sitting United States president - will kickstart a process that will eventually result in North Korea giving up its nuclear weapons.
When the topic of a trade war flaring up as a result of hiked tariffs that Trump promised to enforce, he declared that European countries and Canada need the USA more than the country needs them. Asked by a reporter how he felt about the summit, Trump said: "Very good".
A triumvirate of forces is bringing the meeting to fruition, said Scott Snyder, senior fellow for Korea Studies and director of the Program on U.S. -Korea Policy at the Council on Foreign Relations.
"As the venue and time of the summit have already been announced, security for Kim Jong Un will be tighter than for any other VIPs", said the professor, who was the first academic to establish a university major in South Korea on guarding and protection.
Gidley said he expected Trump and Kim to have "an wonderful conversation without Dennis Rodman in tow". But many, if not all analysts, say that this is highly unlikely, given how hard it has been for Kim to build his program and that the weapons are seen as the only protection he has.
"[President Trump] is not going to permit any show of weakness on the trip to negotiate with North Korea", Kudlow said on CNN's State of the Union.
The United States and North Korea have been in a technical state of war for decades after the eruption of the 1950-1953 Korean War, which pitted U.S. -led U.N. troops backing Seoul against Pyongyang's forces that were aided by China.
He went on to say that the objective of the summit would "be more meaningful with Russian Federation".
In a New Year's address, Kim said his country had completed development of its nuclear programme and would focus on economic development, suggesting a meeting with South Korea. Just meeting with Trump will also give Kim recognition as the leader of a "normal" country and as an equal of the United States leader.
US defense and intelligence officials have assessed the North to be on the threshold of having the capability to strike anywhere in the continental USA with a nuclear-tipped missile - a capacity that Trump and other USA officials have said they would not tolerate.
But critics have warned that the meeting risks being largely light on substance considering what is believed to be a wide gap between the US and the North on the denuclearization issue.