Frye Gaillard is a writer in residence at the University of South Alabama in Mobile. He is the author of the 2009 biography “Prophet From Plains: Jimmy Carter and His Legacy.”

Brooks Flippen is a professor of history at Southeastern Oklahoma State University in Durant, Okla., and a scholar of religion and American politics. He is the author of Jimmy Carter, the Politics of Family, and the Rise of the Religious Right.

Julian Zelizer is a professor of history and public affairs at Princeton University in Princeton, N.J. He is an American political historian and the author of the 2010 biography Jimmy Carter.

Peter Bourne is a visiting senior research fellow at the University of Oxford in Oxford, England. He worked previously as an assistant secretary-general of the United Nations and is the author of the 1997 book Jimmy Carter: A Comprehensive Biography from Plains to Post-Presidency.