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.

Read a Nov. 10, 2005, Washington Times article on IRS investigations of 60 tax-exempt groups, including 20 churches.

Read a Feb. 3, 2009, article from the Chronicle of Philanthropy about the court ruling against the IRS.

Read a Nov. 5, 2012, article from the National Catholic Reporter about the IRS not investigating politicking from churches.

Read a Jan. 17, 2013, editorial from the Washington Post about tax-exempt groups and campaigning.