Professor of Government
BA in Political Science, Drew University; Master's and Doctorate in Political Science, Columbia University. 1970-87, Professor of Political Science, Duke University; since 1987, Professor of Government, Georgetown University; 1994-96, Deputy Assistant Secretary, Inter-American Affairs, US Department of State; 1999-2000, Special Assistant to President Clinton and Senior Director, Inter-American Affairs, National Security Council, White House. 2009-2011, Appointed by President Barak Obama as Assistant Secretary of State for Western Hemisphere Affairs, US Department of State. Since 2013, Senior Adviser, Covington & Burling.