"President Trump and I believe Chairman Kim is the kind of leader who can make those kind of decisions, and in the coming weeks and months, we will have the opportunity to test whether or not this is the case".
Sung-Yoon Lee, a Korea expert at the Fletcher School of Law and Diplomacy at Tufts University, said Trump tempering expectations is "a total victory for North Korea" because it was "able to impress upon President Trump the fake image of North Korea as a reforming party interested in economic development and denuclearization".
What do you think was in the letter delivered to Trump from Kim Jong Un? "How much? How much?" Trump further said, in response to questions, that the transformation of North Korea was possible with Kim remaining in power. "I purposely didn't open the letter".
"I look forward to the day when I can take the sanctions off of North Korea", Trump said.
North Korea's immediate neighbours took the news of the confirmed summit differently.
At the same time, Trump said that he did not like the meeting Russian Foreign Minister Sergei Lavrov had with the North Korean leader this week, but he added that it could be a positive thing.
Kim Yong Chol, vice chairman of North Korea's ruling party executive and a veteran regime insider, arrived for his Oval Office encounter accompanied by the senior U.S. officials who have overseen an extraordinary diplomatic opening.
"We have no idea how this is going to turn out to be", Kim said. "And you know, this war has been going on - it's got to be the longest war - nearly 70 years, right?"
We've become normalized to Trump's tweets.
"I asked them, despite all the caveats and some doubts, whether on balance this meeting between the U.S. and DPRK (North Korea) was positive, and an overwhelming majority thought so", he said.
"Our movement is committed to the abolition of nuclear weapons and we recognize that this historic summit is a once in a generation opportunity to work for peace and nuclear disarmament", ICAN International Steering Group member Akira Kawasaki said in a statement.
"I never said it goes in one meeting".
Pompeo was in the room as Trump and Kim Yong Chol met.
In a move that is sure to worry U.S. allies in Japan and South Korea, Trump also said that he and his guest had discussed United States troop numbers on the Korean peninsula. The huge letter is just part of meticulous steps taken by North Korea to present Kim as a legitimate global statesman who is reasonable and capable of negotiating solutions and making deals, analysts say.
Kim Chang Son, the de facto chief of staff for the North Korean government was seen this week at the centrally located, five-star hotel that is a refurbished government building overlooking the Singapore river.
Mr. Trump has said the June 12 summit is likely only the beginning of talks with North Korea, suggesting he may be in this for the long haul.