Ben Stein

Political Economist, Commentator, Author & Actor

John Oliver

Emmy-Winning Comedian, Best Known for "The Daily Show with Jon Stewart" & "Last Week Tonight"

Bill Maher

Political Satirist & Host of HBO's "Real Time"

Darrell Hammond

Comedian, Actor & Second Longest Running Cast Member of SNL

Lewis Black

Stand-Up Comedian, Actor and Author; Former Correspondent on "The Daily Show"

Dave Barry

New York Times Best-Selling Author & Humorist

Swamp Story: A Novel

Scott Adams

Creator of the Popular Comic Strip "Dilbert", Chief Strategy Officer for WhenHub & Author

Todd Purdum

Senior writer at POLITICO and a contributing editor at Vanity Fair

Stephen Coleman

Stephen Coleman studies applied ethics, particularly the ethics of military and police force, and their application to human rights.

George Monbiot

Investigative Journalist, Known for his Environmental & Political Activism

His Excellency Mikheil Saakashvili

Governor of Ukraine's Odessa Oblast, former President of Georgia

Ronan Farrow

Investigative Reporter, Activist & Lawyer

George P. Bush

Politician & Land Commissioner of Texas

Steve Clemons

Founding Editor at Large at SEMAFOR, Contributing Editor at The Hill & Host of 'The Bottom Line'

Namik Tan

Ambassador of Turkey to the United States in February 2010

Marco Rubio

Senior U.S. Senator from Florida

John Potter

72nd Postmaster General of the United States of America on June 1, 2001, Jack Potter has led the Postal Service to record levels of service, customer satisfaction and efficiency.

Congressman Ron Paul

United States Congressman from Lake Jackson, Texas, a physician, a bestselling author, and a former 2008 U.S. presidential candidate

Jacob Lew

Ambassador of the United States to Israel; Former US Secretary of the Treasury & White House Chief of Staff

Steve Israel

Former U.S. Representative for NY; CNN Political Commentator

Chris Van Hollen

U.S. Representative for Maryland's 8th congressional district, serving since 2003. He is a member of the Democratic Party

John Engler

President of the Business Roundtable (BRT), an association of chief executive officers of leading U.S. corporations with a combined workforce of more than 14 million workers and over $6 trillion in annual revenues.

Douglas W. Elmendorf

Eighth Director of the Congressional Budget Office

Mike Duncan

60th Chairman of the Republican National Committee

Arne Duncan

Managing Partner at Emerson Collective; Former U.S. Secretary of Education

John Danforth

Former United States Ambassador to the United Nations

David Cook

Senior Editor and Washington bureau chief of The Christian Science Monitor

Norm Coleman

Attorney and politician.

Glen Bolger

Republican Party's leading political strategists and pollsters, partner and co-founder of Public Opinion Strategies

Maen Areikat

Palestinian Ambassador to Washington