Disney argued Tuesday that it had a First Amendment right to fire Gina Carano, the actor who played a bounty hunter on “The Mandalorian,” after she allegedly trivialized the Holocaust in an Instagram post. Carano sued in February, arguing that the company unlawfully retaliated against her for expressing her personal political views, which were at odds with Disney’s preferred ideology. Disney’s lawyers filed a motion on Tuesday to throw out the lawsuit, arguing that it has “a constitutional right not to associate its artistic expression with Carano’s speech.” The case touches on a hot-button controversy over speech rights on social...