Democratic presidential candidate Senator Barack Obama and Senator Jim Webb greet supporters as they arrive for a town hall meeting in Lynchburg, Virginia, August 20, 2008. (Jim Young/Reuters)
Democratic presidential candidate Sen. Barack Obama, D-Ill., right, is applauded by Sen. Jim Webb, D-Va., left during a town hall meeting at the E.C. Glass High School in Lynchburg, Va., Wednesday, Aug. 20, 2008. (AP Photo/Steve Helber)
Sen. Jim Webb, D-Va., hugs Democratic presidential candidate Sen. Barack Obama, D-Ill., after introducing him at a town hall meeting at E.C. Glass High School in Lynchburg, Va., Wednesday, Aug. 20, 2008. (AP Photo/Alex Brandon)
Democratic presidential candidate Senator Barack Obama is presented with a cane as he arrives for his town hall meeting in Lunchburg, Virginia, August 20, 2008.
(Jim Young/Reuters)
Democratic presidential candidate Sen. Barack Obama, D-Ill., poses for a photo with Calvin Wayne Tyree, from Lynchburg, with a seal at a town hall meeting at E.C. Glass High School in Lynchburg, Va., Wednesday, Aug. 20, 2008. (AP Photo/Alex Brandon)
Supporters listen to Democratic presidential candidate Sen. Barack Obama, D-Ill., speak at a town hall meeting at E.C. Glass High School in Lynchburg, Va., Wednesday, Aug. 20, 2008.
(AP Photo/Alex Bran