| April 15, 2013 |
Barney Frank, former Chairman of the U.S. House Financial Services Committee |
|
| April 1, 2013 |
Susan Herman, President of the American Civil Liberties Union |
|
| September 4, 2012 |
Rick Santorum, 2012 Republican Party presidential nominee candidate |
|
| April 17, 2012 |
Slavoj Žižek, philosopher |
| January 9, 2012 |
Larry Summers, former Secretary of the Treasury |
| October 25, 2011 |
Eliot Spitzer, former Governor and Attorney General of New York |
| October 11, 2011 |
Ann Coulter, conservative pundit |
| April 13, 2011 |
Stanley McChrystal, retired general and commander of US Afghanistan forces |
| March 29, 2011 |
Bill Richardson, former Governor of New Mexico and 2008 Presidential candidate |
| October 26, 2010 |
Senator John Kerry (D-MA), 2004 Presidential candidate |
| September 8, 2010 |
Karl Rove, Senior Advisor and Deputy Chief of Staff to former President George W. Bush |
|
| April 6, 2010 |
Senator Mark Warner (D-VA), former Governor of Virginia |
| November 10, 2009 |
Joel Klein, former Chancellor of New York Public Schools |
| September 8, 2009 |
Peter Beinart, former editor-in-chief of The New Republic |
| April 21, 2009 |
Dick Morris, political consultant and commentator |
|
| April 6, 2009 |
Eliane Karp-Toledo, former First Lady of Peru |
|
| January 13, 2009 |
Cindy Sheehan, war protester |
|
| September 17, 2008 |
Arianna Huffington, politics blogger |
|
| April 3, 2008 |
Senator Rick Santorum (R-PA) |
|
| February 12, 2008 |
Senator Mike Gravel, Presidential Candidate |
|
| October 17, 2007 |
Richard Stallman, Founder of the Free Software Movement |
|
| September 24, 2007 |
Bill Keller, New York Times Executive Editor |
|
| April 5, 2007 |
Howard Dean, Democratic National Committee Chairman |
|
| January 24, 2007 |
Ned Lamont, Former Senatorial Candidate |
|
| November 9, 2006 |
Supreme Court Justice Antonin Scalia |
|
| November 1, 2006 |
William F. Buckley Jr., for his final public speech on matters of policy |
|
| October 17, 2006 |
Al Sharpton |
|
| September 13, 2006 |
Michael Dukakis, former Presidential candidate |
|
| October 4, 2005 |
John R. Bolton, US ambassador to the United Nations |
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