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CHICAGO — The national Fraternal of Order of Police is demanding an apology after Mayor Lori Lightfoot was overheard calling a police union leader a “clown.”

A microphone near Lightfoot was on and picked up the comment referring to FOP Lodge 7 First Vice President Patrick Murray during Wednesday’s City Council meeting.

Murray was there to express support for the officers who were fired by the Chicago Police Board last week over the alleged cover-up of the murder of Laquan McDonald by a police officer.

When asked about her comment, Lightfoot said it was not appropriate and she was sorry she said it out loud.

The national FOP is calling on the mayor to conduct herself with “more dignity and less immaturity.”

“That’s between the mayor and the Fraternal Order of Police. I’m going to stay out of that fight,” CPD Supt. Eddie Johnson said. “You know, it’s just for all of us, we just have to work together to try make this city safer

The mayor’s office has not commented on the national FOP statement.