Rahm Emanuel
Emanuel was chair of the Democratic Congressional Campaign Committee during the 2006 mid-term elections and remained a top strategist for House Democrats during the 2008 cycle.  After Democrats regained control of the House in 2006, Emanuel was elected chairman of the Democratic Caucus.  This made him the fourth-ranking House Democrat, behind Speaker Nancy Pelosi, Majority Leader Steny Hoyer and Majority Whip Jim Clyburn.