Professor Lee Epstein, Ethan A.H. Shepley Distinguished University Professor at Washington University in St. Louis, discusses her research into the ideologies of U.S. Supreme Court justices. She uses statistical analysis to determine to what extent we can predict justices’ future rulings based on their past records and the ideologies of the presidents that appoint them. Epstein's talk was the 2017 Henry J. Abraham Distinguished Lecture, sponsored by the Thomas Jefferson Center for the Protection of Free Expression.