Angela Merkel

Germany's First Female Chancellor

Rex Tillerson

Former U.S. Secretary of State, Former Chairman and Chief Executive Officer of ExxonMobil

John Kerry

Climate Envoy for National Security; Former U.S. Secretary of State & Bestselling Author of "A Call to Service: My Vision for a Better America"

Arne Duncan

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

Barney Frank

U.S. Congressman (1981-2012); Chairman, House Financial Services Committee (2007-2011)

Karl Rove

Fox News Contributor & Former Senior Advisor to President George W. Bush

Julia Gillard

Former Prime Minister of Australia, First Woman to Hold the Position & Chair of the Global Institute for Women's Leadership

Not Now, Not Ever: Ten years on from the misogyny speech

Nancy Pelosi

Former Speaker Of The House

Meghan McCain

Political Columnist, Author & Award-Winning Blogger

Ehud Olmert

Former Prime Minister of the State of Israel

Jenny Shipley

Former & First Female Prime Minister of New Zealand; First Woman to Have Led the National Party

S.E. Cupp

Conservative Columnist, Best-Selling Author & CNN Political Commentator

Olympia Snowe

Former U.S. Senator, Businesswoman

Arthur Levitt

Chairman, Securities and Exchange Commission (1993-2001)

Christopher Patten

Former British Governor of Hong Kong

Mahathir Bin Mohamad

Former Malaysia Prime Minister

Jonathan Karl

Chief White House Correspondent for ABC News & Co-Anchor of This Week with George Stephanopoulos

Shaukat Aziz

Prime Minister of Pakistan (2004-2007)

Ted Cruz

34th U.S. Senator from Texas

Dick Armey

Former House Majority Leader, Economist