Reihan Salam

President of the Manhattan Group for Policy Research; Former Executive Editor of National Review

Andrew Cohen

Founder, EnlightenNext

Eugene Rivers

Pastor of the Azusa Christian Community

Carolyn Jessop

Polygamist Survivor & Author of "Escape"

Dalia Mogahed

President and CEO, Mogahed Consulting, LLC; Author, "Who Speaks for Islam?"

Rick Santorum

Former Member of the U.S. Senate

David Daleiden

Citizen Journalist & Anti-Abortion Activist

Tony P. Hall

Former U.S. Ambassador to the U.N. Agencies for Food & Agriculture; Former Member of the U.S. House of Representatives

Laurie Beth Jones

Author of Jesus, CEO: Using Ancient Wisdom for Visionary Leadership.

Joshua Bolten

President of the Business Roundtable; Former White House Chief of Staff

Elliott Abrams

Expert in Foreign Policy; Special Representative for Venezuela at the Department of State

Dr. Jill Stein

Physician, Environmental Activist & Politician; 2016 Green Party Presidential Nominee

Peter Gleick

Co-founder & President of the Pacific Institute for Studies in Development, Environment & Security

The Three Ages of Water

Sebastian Copeland

Adventurer, Environmental Activist, Award-Winning Photographer, Author, Lecturer & Founder of the Sedna Foundation

Erin Schrode

Expert Advocate for Health, Sustainability & Environmental Education; Named "America's Green Girl" by OK Magazine

Heidi Cullen

Communications Director for Monterrey Bay Aquarium Research Institute; Climate Scientist

Stephanie Rawlings-Blake

Former Mayor of Baltimore; Former Secretary of the Democratic National Committee; Former President of the U.S. Conference of Mayors

Denise Pope

Lecturer at the Stanford University Graduate School of Education & Co-Founder of Challenge Success

Robert E. Rubin

Former U.S. Treasury Secretary & Chair of the Council on Foreign Relations; Senior Counselor at Centerview Partners

Christine Ervin

Former US Assistant Secretary of Energy; National Leader on Green Buildings & Clean Energy