Fox News’s legal team moved to end Smartmatic’s multibillion-dollar defamation lawsuit, citing the First Amendment.

The network filed a motion to dismiss the voting software company’s $2.7 billion lawsuit on Monday, arguing that the complaint aims to “stifle debate and chill vital First Amendment activities.” Smartmatic alleges that the network engaged in a “disinformation campaign,” which involved giving air time to claims about voting machines and software being involved in election fraud.