Erin Brockovich is an environmental activist and the President of Brockovich Research & Consulting. She also works as a consultant for the New York law firms Girardi Keese and Weitz & Luxenberg and the Australian firm Shine Lawyers. Brockovich is currently investigating the chemical spill near the Elk River in West Virginia. Twitter: @ErinBrockovich
Josh Barro is the Politics Editor at Business Insider and an MSNBC contributor. TIME honored him as one of their 140 Best Twitter Feeds of 2013 and Forbes placed him on their 30 Under 30: Media list in 2012. In his latest column, Barro poses the question: “Just how nice do we want Chris Christie to be?” Twitter: @jbarro
Howard Dean is Chairman Emeritus of the DNC and the founder of Democracy for America, as well as the former Governor of Vermont. He serves on the board of the National Democratic Institute and is a Senior Strategic Advisor and Independent Consultant for the Government Affairs practice at McKenna, Long & Aldridge. Twitter: @GovHowardDean
Carly Fiorina, former CEO of Hewlett-Packard, was the first woman to lead a Fortune 20 company. She is now the Chairman of Good360, a Senior Adviser to the Center for Strategic & International Studies and has established Carly Fiorina Enterprises. Twitter: @CarlyforCA
Willie Nelson is a musician, actor, and activist whose latest album is To All The Girls… He is co-chair of the National Organization for the Reform of Marijuana Laws advisory board. His company, BioWillie Biodiesel, markets a petroleum diesel alternative made from waste vegetable oil that produces 70% less harmful emissions when compared to ultra-low-sulfur diesel. Twitter: @willienelson
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