US Democratic presidential candidate Barack Obama and Michelle Obama board their plane in Chicago

 
US Democratic presidential candidate Barack Obama and Michelle Obama board their plane in Chicago
US Democratic presidential candidate Barack Obama (D-IL) and his wife Michelle prepare to board their plane at Chicago Midway Airport June 3, 2008, en route to his final primary night rally in St Paul. The U.S. is holding its final democratic primaries in South Dakota and Montana on Tuesday. REUTERS/Jason Reed (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)