President, Pew Research Center

Columnist, The Washington Post; Professor of Government, Georgetown University; Senior Fellow in Governance Studies, Brookings Institution

President and CEO, New York Academy of Sciences; Professor of History and Anthropology, University of California, Berkeley

Mezzo-Soprano; Founder and CEO, The Canales Project

President, Best Buy Health

Head, External Engagement, Wells Fargo

Senior Fellow and Director, Africa Program, Center for Strategic and International Studies; Lecturer in African Studies, Johns Hopkins School of Advanced International Studies

President, American Enterprise Institute

Chairman, Kleiner Perkins Caufield Byers; Trustee, Aspen Institute

Founder and Artistic Director, Theater of War Productions

Clinical and Environmental Psychologist; Founder, Sustainable Self

Comedian; Host, "Stand Up! With Pete Dominick," SiriusXM

Co-Founder and Director of Carbon Economics, Nori

Executive Director, Translational Research Institute for Space Health (TRISH), Baylor College of Medicine

Moderator, Open to Debate; Correspondent, ABC News

National Co-Founder, American Tea Party; Founder and President, Conservatives for Energy Freedom and Green Tea Coalition