US Democratic presidential candidate Obama and his running mate Biden stand underneath image of Sen. Clinton at the 2008 Democratic National Convention in Denver

 
US Democratic presidential candidate Obama and his running mate Biden stand underneath image of Sen. Clinton at the 2008 Democratic National Convention in Denver
US Democratic presidential candidate Senator Barack Obama (D-IL) (R) and his running mate Sen. Joe Biden (D-DE), acknowledge supporters as former Democratic presidential candidate Sen. Hillary Clinton (D-NY) is pictured on a monitor above them, at the 2008 Democratic National Convention in Denver, Colorado, August 27, 2008. Democrats nominated Senator Barack Obama (D-IL) on Wednesday as their presidential candidate in a historic first for a black American, sending him into battle against Republican John McCain. REUTERS/Brian Snyder (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)