Will Barack Obama's arrival in the White House really usher in a new era of post-racial politics? Congressman Jim Clyburn is the Majority Whip in the House of Representatives and a member of the Congressional Black Caucus. He's spoken of the emotion he felt on the night that Obama clinched the Democratic nomination. But when the crowds disperse and the ceremonies are over, will President Obama really bring the change he promised to America? Congressman Clyburn talks to Stephen Sackur.