But Trump suggested that China has already been relaxing trade controls.
"I don't think he knows much about, quite frankly, anything when it comes to foreign affairs, national security, even a thing like the war games", said former CIA Director John Brennan of Trump on MSNBC's "Deadline: White House" on Tuesday.
"Overall, the Trump-Kim declaration appears weaker than the 1992 inter-Korean agreement, (former president Bill) Clinton's 2000 communique, and the Six-Party Talks statements of 2005 and 2007".
According to the joint statement, both sides also agreed to recover and return remains of soldiers who were killed or missing in action during the Korean War so they can be repatriated.
Many experts remained sceptical that Kim will ever give up his nuclear weapons, even though Trump insisted the process of denuclearisation will start "very, very quickly".
"So I think the rhetoric, I hated to do it, sometimes I felt foolish doing it, but we had no choice", the president said.
"This was an historic first step in an important negotiation", said Senate Majority Leader Mitch McConnell, R-Ky.
North Korean leader Kim Jong-un's flight to Singapore was a tightly planned maneuver using a decoy to throw attackers off the scent.
Other Republicans raised questions about the necessity of ending the exercises.
The Chinese position echoes comments made by Russian Foreign Minister Sergey Lavrov, who called for a lifting of sanctions during a May visit to Pyongyang, North Korea's capital.
"There is nearly nothing of significant substance - or even new - in this document".
South Korea's presidential office said that it needs to seek clarity on Mr Trump's intentions after he said that Washington will stop joint military exercises.
"For Hawai'i, this should assuage fears of a possible nuclear attack from North Korea". However, there were no specifics offered on future plans, which will be a work in progress for the Trump administration if a deal is to be reached. A federal investigation into alleged Russian meddling in the 2016 election also hangs over his presidency.
"I was concerned the president was going to go there and sign a peace treaty and make a show of it".
Trump himself scoffed at the sceptics earlier on Tuesday.
Of course, it's hard to disassociate Trump's success on the North Korea front from all the other self-inflicted geopolitical wounds he's brought upon himself - the G7 debacle being just the most recent. Despite my many concerns about this 'Shotgun Summit, ' Trump and Kim shaking hands is far preferable to them making war. Trump said he has no plans to decrease the number of USA troops in the South as part of security assurances for the North, but he left open the possibility that he will do so in the future. -South Korea military drills, a key demand from Pyongyang.
Nigeria, he said, appreciated the efforts by all parties involved in the process of the successful Summit, especially the DPPK, U. There is no doubt that this is a historic moment in the relationship between the countries and the region. "The elites on the left want this president to fail", Ingraham said.
"The world will see a major change", Kim vowed. Only time will tell if North Korea is serious this time, and in the meantime we must continue to apply maximum economic pressure. "Why not ease sanctions?"