Derek CholletDerek Chollet served in senior positions in the Obama Administration at the White House, State Department, and Pentagon, most recently as US assistant secretary of defense for international security affairs. Currently the executive vice president of he German Marshall Fund of the United States, he is also a visiting scholar at the University of Pennsylvania's Perry World House. A frequent commentator on US foreign policy and politics, his books include The Long Game: How Obama Defied Washington and Redefined America's Role in the World, America between the Wars: From 11/9 to 9/11 (coauthored with James Goldgeier), and The Unquiet American: Richard Holbrooke in the World (coedited with Samantha Power). Read More Read Less