Philip Hamburger is the Maurice and Hilda Friedman Professor of Law at Columbia Law School in New York.  He wrote the book Separation of Church and State (2002).

Melissa Rogers is a nonresident senior fellow in governance studies for Brookings, where she specializes in the First Amendment’s religion clauses and religion and faith-related political issues. She previously served as special assistant to President Barack Obama and executive director of the White House Office of Faith-based and Neighborhood Partnerships.

Barry Lynn is executive director of Americans United for the Separation of Church and State, a lobbying group based in Washington, D.C.

George Weigel is an orthodox-minded Catholic theologian and distinguished senior fellow at the Ethics and Public Policy Center in Washington, D.C. He is the author of God’s Choice: Pope Benedict XVI and the Future of the Catholic Church (2005) and Witness to Hope (1999), which is essentially the authorized biography of Pope John Paul’s papacy. Weigel also wrote The End […]

Anthony Gill, professor of political science at the University of Washington in Seattle, researches church-state relations from a microeconomic perspective. He teaches a course on religion, politics and economics. His books include Rendering Unto Caesar: The Catholic Church and the State in Latin America. Gill conducts research on community efforts to restrict the property rights of […]

Susan N. Herman is president of the American Civil Liberties Union, which works to promote First Amendment freedoms and prevent censorship.

Gene Policinski is senior vice president and executive director of the First Amendment Center at Vanderbilt University in Nashville, Tenn. The center offers comprehensive research of key First Amendment issues and topics.

Barbara Weinstein is director of the Commission on Social Action of the Religious Action Center of Reform Judaism in Washington, D.C. One of the organization’s missions is to support First Amendment rights.

Tony Perkins is president of the Family Research Council, which works to foster “a culture in which all human life is valued, families flourish, and religious liberty thrives.” He also leads the U.S. Commission on International Religious Freedom, which tracks religious persecution around the world.