Marjorie Taylor Greene - a one-time MAGA ally who has turned into a fierce critic of Donald Trump - has unexpectedly announced she is resigning from Congress.
Her relationship with the president has deteriorated in recent months, and she had vocally campaigned for the justice department to release all of its files concerning the convicted paedophile Jeffrey Epstein.
Mr Trump has been fiercely critical about Ms Greene on Truth Social - describing her as a "lunatic".
In a statement posted on X, she wrote: "Standing up for American women who were raped at 14, trafficked and used by rich powerful men, should not result in me being called a traitor and threatened by the President of the United States, whom I fought for."
Ms Greene went on to confirm her last day in office will be on January 5 - with Mr Trump telling ABC that it is "great news for the country".
The hard-right Republican was one of the most aggressive spokespeople for the Make America Great Again movement - and had become infamous for her combative encounters with journalists, including Sky's Martha Kelner.
She was known for her susceptibility to conspiracy theories, and was widely denounced for comparing COVID-19 masks and vaccinations to the persecution of Jews during the Holocaust.
On social media, she had made posts advocating violence against Democrat opponents - and casting doubt on the 9/11 terror attacks and the school mass shootings at Parkland and Sandy Hook.
The bond between Ms Greene and Mr Trump started to break down after she lambasted his foreign policy - describing it as "America Last".
Mr Trump branded her a "traitor" and "wacky" and said he would endorse a challenger against her when she ran for reelection next year.
In a brief phone call on Friday night, the US president told ABC News that Ms Greene's resignation was "great news for the country." He said had no plans to speak with her but wishes her well.
Last week, Mr Trump had announced that he was withdrawing his support and endorsement for the 51-year-old, who had been expected to run for re-election in Georgia's 14th congressional district next November.
In her resignation statement, Ms Greene said: "I have too much self-respect and dignity, love my family way too much, and do not want my sweet district to have to endure a hurtful and hateful primary against me by the president we all fought for, only to fight and win my election while Republicans will likely lose the midterms."
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A few days ago, Ms Greene had warned the breakdown in relations with the White House had led to her construction company receiving a pipe bomb threat.
She had written on X: "President Trump's unwarranted and vicious attacks against me were a dog whistle to dangerous radicals that could lead to serious attacks on me and my family."
Ms Greene went on to warn his inflammatory rhetoric "puts blood in the water and creates a feeding frenzy that could ultimately lead to a harmful or even deadly outcome".
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