Donald J. Trump sued CNN on Monday, accusing the network of defaming him.

Over the course of his business and political career, Mr. Trump has threatened to take legal action against the media for their coverage. His attacks on the media became a staple of his political messaging and have often been cited in fund-raising entreaties.

The New York Times and The Washington Post were sued by his campaign for defamation. The suit against The Times was thrown out.

Mr. Trump filed a complaint against CNN in Florida. The lawsuit alleges a campaign of defamation in the form of libel and slander, which Mr. Trump says has recently intensified as CNN fears the person will run for president in the future.

Several times, CNN hosts and guests criticized Mr. Trump over his policies and his questioning of the 2020 presidential election result. Some guests have used the history of Nazi Germany to criticize Mr. Trump. Linda Ronstadt is accused of defaming Mr. Trump on the air.

A CNN spokesman wouldn't say anything.

The lawsuit shows that Mr. Trump asked CNN to stop referring to him as a liar. CNN denied Mr. Trump's request and replied, "You have not identified a single false or defamation statement in your letter."

CNN was threatened with a lawsuit by the president. CNN said it was a P.R. stunt. A suit didn't come to fruition.

In Monday's suit, Mr. Trump's lawyers said that CNN's coverage has caused the former president to suffer "embarrassment, pain, humiliation and mental anguish."