Fox News is threatening to sue Tucker Carlson for violating his contract with the launch of his new Twitter show - already watched by more than 80 million people. In a letter obtained by Axios, lawyers for Fox News are said to have sent official correspondence to Carlson's legal team claiming he was in breach of his contract when he aired his new Twitter show Tuesday night. Carlson's lawyers reportedly argued any legal action by Fox would be a direct violation of their client's First Amendment rights, as the newscaster is said to be looking for a way out of a $25 million-a-year contract with the company.