On Cooper's Tuesday show, King said that Greenwald should be prosecuted for publishing documents the reporter knew were classified. He doubled down on his comments during an appearance on Fox News, adding that Greenwald was threatening to release the names of covert CIA agents.

"I was really staggered that a United States congressman, the chairman of the House Homeland Security Committee, actually could go on national television and make up an accusation, literally fabricated out of whole cloth, namely that I have threatened to uncover the names of covert CIA agents as a way of arguing for my arrest and prosecution inside the United States for the crime of doing journalism," Greenwald told Cooper.