Hunter made the false claim that Melania Trump was introduced to President Donald Trump by convicted sex offender and pedophile Jeffrey Epstein, citing a Daily Beast report sourced to author Michael Wolff. 

The Daily Beast report was retracted with an apology, but Hunter still repeated the claim in an interview with the Channel 5 with Andrew Callaghan podcast.

'They knew each other well, they spent an enormous amount of time together,' the former president's son said of Donald Trump and Epstein. 'According to his biographer, Jeffrey Epstein introduced Melania, that's how Melania .. the first lady and the president met.' 

Mrs. Trump's lawyer threatened to sue Hunter Biden for $1 billion unless they 'immediately retract the false, defamatory, disparaging and inflammatory statements made about Mrs. Trump.' 

But Hunter Biden was not interested in an apology, sharing his public reaction on Callaghans show. 

'Fu*k that. That's not going to happen,' Biden replied, after Callaghan showed him a copy of the letter. 

The logo on Hunter Biden's hat featured a logo with three arrows inside a circle.

The symbol is similar to that of the Iron Front resistance to the Nazi party in Wrold War II era Germany. Anti-Trump groups like Antifa have adopted the symbol as their own.

Hunter Biden defended his comments, citing reporting from Wolff's book, and a 2019 story from the New York Times that reported Epstein was 'claiming to people that he was the one who introduced Mr. Trump to his third wife, Melania Trump.'

In a letter addressed to Biden and his longtime lawyer Abbe Lowell, the first lady's lawyer Alejandro Brito called Biden's comments 'false, defamatory, and lewd.'

'Given your vast history of trading on the names of others-including your surname-for your personal benefit, it is obvious that you published these false and defamatory statements about Mrs. Trump to draw attention to yourself,' Brito wrote in a letter, first obtained by Fox News Digital.