Frances Hill is a University of Miami law professor and an expert on the political rights of tax-exempt organizations. She has said tax-exempt organizations can be passionate about politics without losing their tax-exempt status.

Peter Frumkin is professor of social policy, faculty director of the Center for High Impact Philanthropy, and director of the nonprofit leadership program at University of Pennsylvania.He is the author of On Being Nonprofit: A Conceptual and Policy Primer (Harvard University Press, 2005).

Rikki Abzug is a professor of management at Anisfield School of Business at Ramapo College in New Jersey.

Richard Pomp is a law professor at the University of Connecticut and a tax expert.

J. Bryan Hehir is the Parker Gilbert Montgomery Professor of the Practice of Religion and Public Life at the Hauser Center for Nonprofit Organizations at Harvard University’s John F. Kennedy School of Government. He is an expert on religion and American society.

David Ryden is professor of political science at Hope College in Holland, Mich., and co-author of Of Little Faith: The Politics of George W. Bush’s Faith-Based Initiatives (Georgetown University Press, 2004).

Doug Koopman is professor of political science at Calvin College in Grand Rapids, Mich., and co-author of Of Little Faith: The Politics of George W. Bush’s Faith-Based Initiatives (Georgetown University Press, 2004).

Robert V. Kemper, an anthropology professor at Southern Methodist University in Dallas, Texas, co-authored The World As It Should Be: Faith-Based Community Development in America, on his website.

Jimmy Dorrell is co-founder and executive director of Mission Waco, a ministry to empower the poor, mobilize middle-class Americans and address systematic social injustices. He is pastor of Church Under the Bridge and also teaches classes at Baylor University and Truett Seminary in Waco.