'An Enemies List': MSNBC's Nicolle Wallace Denounces Trump's Latest 'Alarming' Attack as a 'Watershed Moment' in His Presidency

MSNBC's Nicolle Wallace appeared stunned Monday afternoon as she reported President Donald Trump's latest norm-breaking behavior: The White House announced that it will review the process for revoking the security clearances of six former U.S. officials who the president has come to see as political opponents.

"Donald Trump today releasing an enemies list," Wallace said at the opening of her show "Deadline: White House." "A list of former national security officials that his White House is targeting for the possible punishment of stripping these officials of their security clearances. Now the pre-Trump tradition is that all former CIA, NSA, FBI, and DNI directors hold a security clearance for the purpose of strengthening the collective wisdom and expertise of the U.S. government and the American president who heads it."

She continued: "It's an alarming move to deprive the federal government of decades of institutional knowledge on the gravest threats facing the country."

Former CIA Directors Michael Hayden and John Brennan, former FBI Director James Comey, former national security adviser Susan Rice, former Acting Director of the FBI Andrew McCabe, and former Director of National Intelligence James Clapper all made this "enemies list."

Wallace noted that a former senior intelligence official told her the threat was a "watershed moment" in Trump's presidency, saying that using security clearance revocations as punishment for using their free speech crosses a line.

Watch the clip below: