William H. McRaven, a retired four-star admiral and former Navy SEAL, slammed President Trump’s characterization of the media as “the enemy of the American people,” calling that sentiment the “greatest threat to democracy” he’s ever seen.

That’s coming from a man who’s seen major threats to democracy.

McRaven, who was commander of the secretive Joint Special Operations Command, organized and oversaw the highly risky operation that killed Osama bin Laden almost six years ago. The admiral from Texas had tapped a special unit of Navy SEALs to carry out the May 2011 raid on the elusive terrorist’s hideout, a high-walled compound in Abbottabad, Pakistan, The Washington Post’s Craig Whitlock reported shortly after bin Laden’s death.

McRaven left the military in 2014 after nearly four decades and later became chancellor of the University of Texas System. The UT-Austin alumnus, who has a bachelor’s degree in journalism, addressed a crowd at the university’s Moody College of Communication on Tuesday.