Sullivan, 36, is Biden's national security adviser. He previously worked as the deputy policy director for Hillary Rodham Clinton's presidential campaign and went on to serve as director of policy planning and deputy chief of staff in the State Department. Before that, he worked as chief counsel to Sen. Amy Klobuchar, D-Minn., as a lawyer at Faegre & Benson in his hometown of Minneapolis, and as a law clerk for Supreme Court Justice Stephen Breyer. "Jake is the ideal person to serve as my national security adviser," Biden said in a statement when he picked Sullivan. "He is respected across the administration for his intellect, his dedication to our country, and the perspective he brings to even the most complex issues. He has been part of some of the biggest foreign policy challenges our nation has faced, and he's always handled himself with incredible skill." Sullivan received his bachelor's degree in political science from Yale University. He earned a master's in international relations as a Rhodes scholar at Oxford and a law degree from Yale. When Time magazine identified him three years ago as one of 40 political rising stars under 40 years old, Sullivan named Harry Truman as his hero.