Inside Obama’s Sweeping Victory, November 5, 2008: “Barack Obama captured the White House on the strength of a substantial electoral shift toward the Democratic Party and by winning a number of key groups in the middle of the electorate. Overall, 39% of voters were Democrats while 32% were Republicans — a dramatic shift from 2004 when the electorate was evenly divided. The Democratic advantage in Election Day party identification was significantly larger than in either of Bill Clinton’s victories.”