US Democratic presidential nominee Senator Barack Obama (D-IL) calls voters during a surprise stop at Obama campaign headquarters in Kansas City, Missouri

 
US Democratic presidential nominee Senator Barack Obama (D-IL) calls voters during a surprise stop at Obama campaign headquarters in Kansas City, Missouri
U.S. Democratic presidential nominee Senator Barack Obama (D-IL) calls voters during a surprise stop at Obama campaign headquarters in Kansas City, Missouri, October 18, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)