President Barack Obama participates in a discussion about poverty during the Catholic-Evangelical Leadership Summit on Overcoming Poverty, at Georgetown University in Washington, D.C., May 12, 2015. From left, moderator E. J. Dionne, Jr., Washington Post columnist and professor in Georgetown’s McCourt School of Public Policy, Robert Putnam, professor of public policy at the Harvard University John F. Kennedy School of Government and Arthur Brooks, president of the American Enterprise Institute.