Democratic presidential hopeful Sen. Barack Obama D-Ill., shakes hands at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008.
(AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., jogs to shake hands at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008. (AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., watches the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008. (AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., shakes hands at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008. (AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., shakes hands at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008. (AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., shakes hands at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008.
(AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., shakes hands at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008. (AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., hugs two riders at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008.
(AP Photo/Alex Brandon)
Democratic presidential hopeful Sen. Barack Obama D-Ill., waves to the crowd as he gets on the bus after shaking hands at the Little 500 women's bicycle race at the University of Indiana in Bloomington, Ind., Friday, April 11, 2008. (AP Photo/Alex Brandon)