This project uses data from three main sources:
The Supreme Court Database is the definitive source for researchers, students, journalists, and citizens interested in the U.S. Supreme Court. The Database contains over two hundred pieces of information about each case decided by the Court between the 1946 and 2012 terms. Examples include the identity of the court whose decision the Supreme Court reviewed, the parties to the suit, the legal provisions considered in the case, and the votes of the Justices. It is maintained by Washington University, St. Louis and contains data on 8,407 cases, 655 of which are classified as First Amendment cases.