Fox News is facing a legal earthquake after a new court filing revealed that Fox hosts privately expressed disbelief about election fraud claims.

The filing, made by the voting technology company Dominion, is part of a defamation lawsuit against Fox News. The suit alleges that Fox News and several of its hosts, including Sean Hannity, spread false claims about Dominion’s role in the 2020 election.

In the filing, Dominion alleges that Hannity and other Fox News hosts knew the claims were false, but continued to spread them. Hannity has since admitted that he knew the claims were false and called them “total BS” in private.

Fox has responded to the lawsuit by arguing that the First Amendment protects its right to free speech. The network has also argued that Dominion cannot prove that it suffered $1.6 billion in damages as a result of the false claims.

The case is likely to have far-reaching implications for the media industry, as it could set a precedent for how much legal protection media outlets have when they spread false information.

The case is ongoing and no verdict has been reached yet.