Evansville, UNITED STATES
US Democratic presidential candidate Obama acknowledge supporters at his Pennsylvania primary election...
US Democratic presidential candidate Senator Barack Obama (D-IL), his wife Michelle (L) and singer John Mellencamp (R)
acknowledge supporters at his Pennsylvania primary election in Evansville, Indiana, April 22, 2008. Indiana will hold one of the next Democratic primary elections on May 6. REUTERS/John Gress (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)