Here is the President's letter to Kim Jong Un.
In the letter, Mr. Trump did not foreclose the possibility of meeting with Kim, but the move represented a major foreign policy setback for the President, who had made the case that his diplomatic efforts had brought dramatic changes to future U.S.-North Korean relations.
At a previously scheduled hearing on Capitol Hill, Secretary of State Mike Pompeo read the letter to Senators, and immediately faced criticism from some Democrats.
"The cancellation of this summit reveals the lack of preparation on the part of President Trump in dealing with a totalitarian dictator like Kim Jong Un," said Sen. Bill Nelson (D-FL).
"“To make matters worse, the President’s bizarre letter returns to the same bellicose rhetoric that last year heightened tensions and raised the specter of war," said Rep. Eliot Engel (D-NY).
"The art of diplomacy is a lot harder than the art of the deal," said Sen. Bob Menendez (D-NJ).
In a back-and-forth with Menendez at a previously scheduled hearing of the Senate Foreign Relations Committee, Secretary Pompeo defended U.S. preparation for the North Korean summit, blaming the failure on the Pyongyang regime, as Pompeo said in the last week, their North Korean counterparts had simply stopped communicating with the U.S.
"I regret the statements the North Koreans have made over the last few days," Pompeo said, telling Senators he had made clear that the U.S. expected Kim to agree to a complete dismantling of the North Korean nuclear weapons program.
Asked by Sen. Jeanne Shaheen (D-NH) if the White House had told South Korea and Japan in advance of the decision to cancel the summit, Pompeo did not give a direct answer, as he kept the focus - and blame - on Kim Jong Un.
"In some ways, it is situation normal," Pompeo said in a somewhat resigned voice. "The pressure campaign continues."
"Not a lot of insight there," Shaheen replied.
Republicans on Capitol Hill stood by the President, blaming North Korea for backing off a pledge to walk away from their nuclear program.
"I 100% support the President’s decision," said Sen. Marco Rubio (R-FL). "For two weeks now, North Korean tyrant Kim Jong Un has been trying to sabotage the summit and set the United States up to take the blame."
"Kim Jong Un is a murderous despot and habitual liar," said Sen. Ben Sasse (R-NE). "The President made the right call to cancel this summit."
"I think Kim Jong Un has walked away from a historic opportunity for peace," said Sen. Corey Gardner (R-CO), "and should be held accountable for his decision."
On Capitol Hill, Pompeo said there was still hope things would change in the future, but for now, the North Koreans remain a threat.