Rothgerber Johnson and Lyons is a for-profit law firm whose specialties include religious issues, including religious liberty and church-state issues. It has offices in Denver and Colorado Springs in Colorado and in Casper, Wyo. Its website includes a religious liberty archive with court cases and many relevant documents. Contact Patrice Hettinger.

The North American Religious Liberty Association advocates a “broad interpretation” of the Free Exercise Clause and supports religious freedom. It is based in Simi Valley, Calif. Alvin Kibble is its president.

People for the American Way, based in Washington, D.C., is a nonprofit organization that works to strengthen the separation between church and state.

The Coalition for the Separation of Church and State is a separationist umbrella organization. The website contains links to member organizations with contact information for each. Contact President Jeff Lucas via the website.

Americans for Religious Liberty is an interest group in Silver Spring, Md., that monitors issues of the separation of church and state. Albert J. Menendez, the ARL research director, has analyzed the religious makeup of each Congress since 1972. Contact Menendez

The Ethics and Public Policy Center is a conservative, Washington, D.C.-based think tank and advocacy group. Founded in 1976, the group describes itself as “dedicated to applying the Judeo-Christian moral tradition to critical issues of public policy” and advocacy of founding principles such as the rule of law. The EPPC’s president is Ryan T. Anderson.

Faith and Action is a nonprofit that advocates for Christian values in Washington, D.C., by meeting with policy-makers and politicians. One of its major projects is presenting politicians with Ten Commandments plaques and displays. Its founders are Paul and Rob Schenck. Schenck is also its president. Contact Peggy.

The Catholic League for Religious and Civil Rights is a Catholic civil rights advocacy group that responds to religious discrimination issues concerning Catholics and other Americans. It is based in New York but has chapters throughout the United States. Bill Donohue is its president.

The Alliance for the Separation of School and State is a nonprofit working to remove government involvement in public school education. It is based in Clovis, Calif. Alan Schaeffer is its president.