"President Moon said let's get this done in a year," Bolton said. "And Kim Jong-un said yes."

Talking on ABC's "This Week" on Sunday, Bolton claimed once again that North Korean leader Kim Jong-un promised South Korean President Moon Jae-in in their summit on April 27 that he would denuclearize within a year.

"On April the 27th at Panmunjom, Kim Jong-un met with President Moon Jae-in of South Korea and at that meeting, as President Moon reported to us, President Moon pointed out that the more rapidly North Korea denuclearizes, they sooner could come the benefits of openness to foreign aid from Japan and South Korea, foreign investment from any number of countries," he said. "President Moon said let's get this done in a year."

Asked if that is the "time frame," Bolton said, "Kim Jong-un said yes. So the one-year period that we've talked about from the point where North Korea makes the strategic decision to denuclearize is something that the North and South Koreans have already agreed to."

"Why is that significant?" he added. Because U.S. President Donald Trump "has gone out of his way to hold the door open for Kim Jong-un, that’s what the Singapore meeting was about."

Bolton first made the claim on Fox News on Aug. 5, but Cheong Wa Dae has declined to comment. Bolton also hailed U.S. efforts to push for denuclearization, even though their results have been negligible. He claimed U.S. Secretary of State Mike Pompeo "has done extraordinary follow-up diplomacy after the Singapore meeting. As I say, we expect that's going to resume in the near future."

Pompeo is poised to visit Pyongyang for a fourth time to see if he can move matters forward. "I think Secretary Pompeo will be returning to Pyongyang soon for his fourth visit," Bolton said. "The timing will be announced at an appropriate point by the State Department."

