Hunter Biden has challenged Donald Trump Jr. to a cage fight in an unhinged social media rant attacking the UFC Freedom 250 event on the White House South Lawn.

Styled as a letter to Joe Rogan – who told anyone offended by the combat-sport spectacle to “shut the f–k up” — the former first son claimed it denigrated the “sacred” public space of the White House.

“The White House does not belong to Donald Trump. It does not belong to any president. It belongs to the people,” he wrote in the lengthy diatribe.

“To treat it as Caesar treated the Colosseum is antithetical to everything our founding fathers fought for.

This is not Rome. Presidents are not emperors doling out bread and circuses for the peasants,” he said, cloaking his critique in a Roman Empire motif.

“By holding the event on the South Lawn, what he was saying to the rest of us is: ‘This is my house. I own it. I will do with it what I please. I’ll build a colosseum and have the gladiators fight under my gaze.”

Though he praised Rogan and UFC founder Dana White’s establishing of the fight brand as a “bona fide American success story,” he lambasted Sunday’s event at the White House as “an exhibition of imperial domination, not a celebration of our 250th anniversary as a democracy.”

He closed the missive with the reminder, “the president is our servant. Not our Caesar,” before proposing the cage match.

“P.S. Cage match between me and Don. Jr? Your call on the venue. Anywhere but the South Lawn.”

Curiously, Biden didn’t mention the times his father was accused of diminishing the White House and American flag, like when a Pride banner was placed at the center of a display that adorned the Truman Balcony in 2023 in violation of US flag code.

He also didn’t mention a controversial event that year in which transgender TikTokkers were invited to pose topless – on the South Lawn no less – to show off their mastectomy scars.