"The North Koreans did not come with anything new," Hayden said on CNN. "The new element is that we [the United States] agreed to stop our annual exercise cycle with our South Korean allies. That’s actually a pretty significant concession."
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As an analyst for CNN, Hayden is a frequent on-air critic of Trump, and the author of the book that is equally critical of the US president: "The Assault on Intelligence: American National Security in an Age of Lies."
Hayden served as director of the National Security Council during the administration of President George W. Bush and as CIA chief under President Barack Obama.
During Tuesday’s summit in Singapore, the two leaders agreed to begin negotiations to denuclearize the Korean Peninsula while Trump offered to halt annual war games with South Korea.