Retired Adm. William McRaven, who oversaw the U.S. operation that killed Osama bin Laden, doubled down on Sunday on his criticism of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's treatment of the press after the president went after McRaven in an interview with "Fox News Sunday."

Trump dismissed McRaven as a "Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE fan" and an "Obama-backer," and suggested the U.S. took too long to hunt down bin Laden after anchor Chris Wallace noted that the retired admiral has called the president's rhetoric toward the media "the greatest threat to democracy in my lifetime."

McRaven told CNN in a statement that he stands by his comments.

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"I stand by my comment that the President's attack on the media is the greatest threat to our democracy in my lifetime," he said. "When you undermine the people's right to a free press and freedom of speech and expression, then you threaten the Constitution and all for which it stands."

McRaven, 63, noted that he did not back former Democratic presidential nominee Hillary Clinton or any other candidate in the 2016 election, and that he worked under both former President Obama and former President George W. Bush.

The president routinely derides negative press coverage as "fake news" and has referred to members of the media as the "enemy of the people."

The retired admiral previously criticized the Trump administration over its decision to rescind former CIA Director John Brennan John Owen BrennanJournalism or partisanship? The media's mistakes of 2016 continue in 2020 Comey on Clinton tweet: 'I regret only being involved in the 2016 election' Ex-CIA Director Brennan questioned for 8 hours in Durham review of Russia probe MORE's security clearance. McRaven praised Brennan's integrity and professionalism, and said it would be "an honor" for the Trump White House to revoke his security clearance as well.

"If you think for a moment that your McCarthy-era tactics will suppress the voices of criticism, you are sadly mistaken," McRaven wrote in August. "The criticism will continue until you become the leader we prayed you would be."