Former President Donald Trump is suing Twitter to get his account reinstated, according to a new court filing.

Trump, who was banned from the platform for his words and actions preceding the Jan. 6 attack on Capitol Hill, said in Friday’s filing seeking a preliminary injunction from the U.S. District Court for the Southern District of Florida that the website, which exercises “immeasurable, historically unprecedented, and profoundly dangerous” power over U.S. political discourse, amounted to censorship in violation of the First Amendment.