US Democratic presidential candidate Senator Barack Obama (D-IL) listens to a question from the audience during a campaign stop in Plainfield

 
US Democratic presidential candidate Senator Barack Obama (D-IL) listens to a question from the audience during a campaign stop in Plainfield
US Democratic presidential candidate Senator Barack Obama (D-IL) listens to a question from the audience during a campaign stop in Plainfield, Indiana March 15, 2008. REUTERS/Frank Polich (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)