The Presbyterian Office of Public Witness is the public policy information and advocacy office of the General Assembly of the Presbyterian Church (U.S.A.). Its task is to advocate, and help the church to advocate, the social witness perspectives and policies of the Presbyterian General Assembly. The church has a long history of applying these biblically and theologically-based insights to issues that affect the public — maintaining a public policy ministry in the nation's capital since 1946.
Reformed theology teaches that because a sovereign God is at work in all the world, the church and Christian citizens should be concerned about public policy. In addition, Presbyterian forefather John Calvin wrote, "Civil magistery is a calling not only holy and legitimate, but by far the most sacred and honorable in human life."