The Pacific Justice Institute is a nonprofit legal defense organization that specializes in religious and civil liberties cases. Its president is Brad Dacus. The institute is based in Sacramento, Calif.

The Liberty Counsel is a nonprofit litigation and educational organization based in Orlando. It is dedicated to advancing religious liberty, “the sanctity of human life and the traditional family.” Mathew Staver is its founder and chairman.

The Christian Law Association defines itself as a “ministry of legal helps” to “Bible-believing churches” and Christians who are experiencing legal difficulty in practicing their religious faith because of governmental regulation, intrusion or prohibition. It is based in Seminole, Fla., and headed by David Gibbs Jr.

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.