Mark Victor Tushnet (born 18 November 1945) is an American legal scholar. He specializes in constitutional law and theory, including comparative constitutional law, and is currently the William Nelson Cromwell Professor of Law at Harvard Law School. Tushnet is identified with the critical legal studies movement. Tushnet is a main proponent of the idea that judicial review should be strongly limited and that the Constitution should be returned "to the people." In 2020, he published a book extending his previous writing about judicial overreach concerning the process of judicial review, which he originally started discussing in his 1999 book on this subject.