President Trump signaled Sunday that he’s ready to rumble with the mainstream news media — tweeting a video in which he takes down CNN with a vicious pro-wrestling move.

The doctored clip shows Trump using a “clothesline” maneuver to flatten an opponent with CNN’s logo in place of his head, then pummeling him into submission on the ringside floor.

The brawler-in-chief’s video broadside — which he captioned “#FraudNewsCNN #FNN” — spurred the network to immediately jump into the fray and accuse Trump of goofing off ahead of his Wednesday departure for the G20 summit meeting in Germany.

“Instead of preparing for his overseas trip, his first meeting with Vladimir Putin, dealing with North Korea and working on his health care bill, he is instead involved in juvenile behavior far below the dignity of his office,” CNN said in a statement.

“We will keep doing our jobs. He should start doing his.”

Top White House officials made light of the online battle royal, with one giving partial credit for Trump’s video attack to Dan Scavino, the president’s former caddy-turned-social media director.

“I thought it was funny,” one official told the Daily Beast.

“Glad Scavino and the president did that.”

Another unnamed senior Trump aide noted: “The president fights back. It’s rich that some of you people [in the media] can never take a joke.”

Later in the day, Trump doubled down on his willingness to go to the mat by tweeting video of his Saturday appearance at a gathering of evangelical Christians in Washington, DC.

“The fake media is trying to silence us, but we will not let them because the people know the truth,” Trump says in the clip.

“The fake media tried to stop us from going to the White House, but I’m president and they’re not.”

His remarks prompted cheers, applause and a standing ovation from the crowd inside the John F. Kennedy Center for the Performing Arts.

The escalation of hostilities followed CNN’s recent retraction of a report claiming a Trump ally was under investigation by the feds over a purported Jan. 16 meeting with the director general of a Russian sovereign wealth fund.

CNN publicly apologized to Trump transition team member Anthony Scaramucci and ousted three staffers over the story, which was based on a single, unnamed source and admittedly didn’t meet the network’s “editorial standards.”

The video Trump tweeted was taken from 2007’s WrestleMania 23, during which Trump squared off with World Wrestling Entertainment chairman Vince McMahon in a “Battle of the Billionaires” stunt.

Trump won their face-off and victoriously shaved the head of McMahon, whose wife, Linda McMahon, is now a member of Trump’s cabinet.

The clip was posted last week on the Reddit website’s pro-Trump page “the_donald” under the title “Trump takes down fake news.”

The person who posted the video goes by the screen name “HanA–holeSolo” and whose avatar is a star-spangled version of the “Pepe the Frog” character.

“Wow!! I never expected my meme to be retweeted by the God Emporer himself!!!” “Han” wrote Sunday.

The boast was accompanied by another doctored video clip showing the “Droopy Dog” cartoon character wearing a red “Make America Great Again” cap and waving Old Glory.

Trump’s tweeting of the video also prompted complaints by CNN and others that he was encouraging physical attacks on reporters.

“It’s very disturbing. There is nothing lighthearted about it whatsoever — it is an incitement,” famed Watergate reporter Carl Bernstein said on CNN’s “Reliable Sources.”

US Rep. Eric Swalwell (D-Calif.) said Trump’s tweet “may be one of the lowest points of any presidency.”

“I am calling on EVERY @HouseGOP Member of Congress to condemn this. You were elected to be a check on power. Check it, or you condone it,” he wrote on Twitter.

House Minority Leader Nancy Pelosi (D-Calif.) also tweeted: “Violence & violent imagery to bully the press must be rejected. This #July4th, celebrate freedom of the press, guardians to our democracy.”

A Trump administration official rejected the criticism, saying, “I think that no one would perceive that as a threat.”

“I hope they don’t. I do think that [Trump has] beaten up in a way on cable platforms that he has a right to respond to,” homeland security adviser Tom Bossert told ABC’s “This Week.”