And more than three months after the summit, North Korea's top diplomat Ri Yong Ho told world leaders at the UN General Assembly that the country does not see a "corresponding response" from the United States to North Korea's early disarmament moves.
The North, however, doesn't "see any corresponding response" from Washington.
Instead of addressing the North's concerns about the absence of a peace regime on the Korean Peninsula, Ri said, the U.S. has insisted that denuclearization come first and increased pressure through sanctions.
Mr Kim has also promised to dismantle North Korea's main missile testing and launching site, and said he could decommission the main nuclear test site, if the United States took some reciprocal action.
Mr Park said tighter border controls between North Korea and China and higher rates charged by people smugglers were key factors. Instead, he noted, the U.S.is continuing sanctions aimed at keeping up pressure on North Korea. "But the problem is that the continued sanctions are deepening our mistrust", he added.
Trump also joked about the criticism he would get from the news media for making a comment some would consider "unpresidential" and for being so positive about the North Korean leader.
After their summit in Singapore, Trump and Kim issued a vague statement about a nuclear-free peninsula without describing when and how it would occur.
The US secretary of state, Mike Pompeo, seems to be on the verge of restarting deadlocked nuclear diplomacy more than three months after the Singapore meeting.
"They're great letters. We fell in love", he repeated.
While addressing his partisans at a West Virginia rally, Trump told fellow Republicans, "And then we fell in love - OK?"
Mr. Trump again called Ms. Warren "Pocahontas", reprising his nickname based on her previous unsubstantiated claims of Native American heritage, and said the Democratic Party has grown so liberal it's even outflanked the famously left-wing crusader.
Nevertheless, Trump cheered his summit, claiming that North Korea "no longer" posed a nuclear threat.