Michael Wolff Sues First Lady Melania

"Mrs. Trump and her 'unitary executive' husband along with their MAGA myrmidons have made a practice of threatening those who speak against them with costly SLAPP actions in order to silence their speech," Wolff said in the filing.

"While the First Amendment has not changed radically in the country, there's been an attack and an attempt to discredit the press and journalists generally that have led to the changed atmosphere," Wolff's attorney David Korzenik tells Axios.

Wolff argues the claims were either taken out of context, not authored by him or were protected opinions backed by facts.

"It is not defamatory to say that Mrs. Trump is actively managing the present White House response to the controversy," the filing said. "Nor is it defamatory to say that Mrs. Trump was involved in Epstein's rather expansive social circle."

"These threatened legal actions are designed to create a climate of fear in the nation so that people cannot freely or confidently exercise their First Amendment rights," he said in the suit.

"First Lady Melania Trump is proud to continue standing up to those who spread malicious and defamatory falsehoods as they desperately try to get undeserved attention and money from their unlawful conduct," her spokesperson told Axios.

"To be perfectly honest, I'd like nothing better than to get Donald Trump and Melania Trump under oath in front of a court reporter and actually find out all of the details of their relationship with Epstein," Wolf said in an Instagram video Wednesday.