First Lady Melania Trump has threatened to sue Hunter Biden for $1 billion if he does not retract statements he made about her alleged links to Jeffrey Epstein and apologise.
A lawyer representing Mrs Trump has written a letter to Mr Biden, the son of former US president Joe Biden, about "false, disparaging, defamatory and inflammatory" claims he made.
The letter, obtained by Fox News, references comments Mr Biden made while speaking with journalist and content creator Andrew Callaghan.
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The interview, titled "Hunter Biden Returns", was posted to YouTube and has so far been viewed more than 1.3million times.
In the video, Mr Biden discusses Donald Trump and child sex offender Epstein, saying it was "beyond a doubt" that they were "very close friends".
He also claimed Epstein introduced the First Lady to the US President.
"They spent an enormous time together," Mr Biden said.
"According to [Trump's] biographer [Michael Wolff] is that Jeffrey Epstein introduced Melania.
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Melania Trump has threatened to sue Hunter Biden
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"That's how Melania, the First Lady, and the President met, according to Michael Wolff."
Mr Wolff has written four books about Mr Trump, the most recent having been published this year.
Mrs Trump's lawyer, Alejandro Brito, said the author was a "serial fabulist" in the letter to Mr Biden and referenced "lies" he allegedly told about Mrs Trump which were published in an article by The Daily Beast.
The news website later apologised and removed the article.
Donald and Melania Trump pictured with sex offenders Jeffrey Epstein, and Ghislaine Maxwell in 2000
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Mr Brito demanded in the letter that Mr Biden issues a "full and fair retraction" of the video and issue an apology or face paying $1billion in damages.
The letter, published by Fox News, concludes: "If you do not comply with the above by August 7, 2025, at 5pm EST, Mrs Trump will be left with no alternative but to enforce her legal and equitable rights, all of which are expressly reserved and are not waived, including by filing legal action for over $1billion in damages.
"You are on notice."
A source told Fox News Digital that Mr Biden did not meet the requests by the stated deadline.
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