It is an earthquake for the MAGA ecosystem.
Donald Trump and Marjorie Taylor Greene were a formidable alliance on the Republican Party's hard-right flank.
For years, the congresswoman for Georgia embodied the combative, conspiracy-tinged politics that define Trump's presidency.
She called him "the father of the America First movement," campaigned to be his running mate, and was quick to defend him.
"David Cameron can kiss my ass," she told Sky News when asked about the former UK prime minister's concerns about US fading support for Ukraine.
Door-stepped by my colleague Martha Kelner, she said: "We don't give a crap about your country or your reporting.
"The Trump administration is doing a great job and I stand by their statements," she added.
"I'm thankful to President Trump that he is leading us out of wars."
Watch Sky's Martha Kelner clash with Taylor Greene earlier this year...
But in recent months, she had expressed concerns about Trump's involvement in the Middle East, Ukraine and elsewhere.
It escalated when she stood with victims of sex offender Jeffrey Epstein to demand justice and joined Democrats in demanding a vote on the release of all files.
Just days ago, President Trump told reporters Taylor Greene had "lost her way", but something triggered a war of words late on Friday.
The president had taken questions on Air Force One, with two reporters citing Taylor Greene's demand that the files be released.
Moments later, President Trump posted on Truth Social that he was withdrawing his endorsement of the congresswoman.
He branded her a "ranting lunatic", "wacky Marjorie", and said all she ever does is "COMPLAIN, COMPLAIN, COMPLAIN."
Her reply came very quickly, in a post claiming she had sent the president text messages about Jeffrey Epstein.
"Apparently this is what sent him over the edge. The Epstein Files," she posted.
Read more on Jeffrey Epstein:
Ghislaine Maxwell 'wants Trump to commute sentence'
What Epstein's right-hand woman said about Trump and Andrew
She accused him of "coming after" her to "scare all the other Republicans" before next week's vote to release the Epstein files.
"It's astonishing how hard he's fighting to stop the Epstein files from coming out that he actually goes to this level," she added.
For years, they were joined at the hip - Trump the movement's figurehead, Taylor Greene its megaphone - but it has now descended into open hostility.
Epstein, the story that won't go away, has just cost Trump one of his most loyal allies, and rocked the internal dynamics of his political movement.
(c) Sky News 2025: Former Trump ally Marjorie Taylor Greene claims Epstein files 'sent him over the edge'

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