U.S. President Donald Trump speaks as John Bolton, national security advisor, listens during his meeting with Klaus Iohannis, Romania's president, not pictured, in the Oval Office of the White House in Washington, DC, Aug. 20, 2019. EPA

U.S. President Donald Trump on Thursday blamed his former national security adviser, John Bolton, for the current deadlock in nuclear talks with North Korea.

Trump's attack on Bolton comes as news media have reported unflattering revelations about the president using excerpts from the former adviser's yet unpublished memoir.

"When Wacko John Bolton went on Deface the Nation and so stupidly said that he looked at the 'Libyan Model' for North Korea, all hell broke out," Trump tweeted, referring to Bolton's April 2018 interview on the CBS show, "Face the Nation."

The Libya model Bolton suggested centers on getting North Korea to first surrender its nuclear and ballistic missile programs and then receive concessions in return.