U.S. Embassy in Japan · Public domain

Ran Bill Clinton's 1992 campaign finance operation before serving in his administration, then returned to politics from Wall Street to win an Illinois congressional seat in 2002. As chair of the Democratic Congressional Campaign Committee he engineered the 2006 House takeover, then served as Barack Obama's first White House chief of staff during the 2009 financial crisis and passage of the Affordable Care Act. He was elected mayor of Chicago in 2011 and later served as U.S. ambassador to Japan.