Democratic presidential hopeful, Sen. Barack Obama, D-Ill., center, arrives with Sen. Claire McCaskill, D-Mo., left, at a town hall-style meeting held at Thorngate Ltd., in Cape Girardeau, Mo., Tuesday, May 13, 2008. (AP Photo/Jae C. Hong)
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., left, smiles as he is introduced by Sen. Claire McCaskill, left, D-Mo., at a town hall-style meeting held at Thorngate Ltd., in Cape Girardeau, Mo., Tuesday, May 13, 2008. (AP Photo/Jae C. Hong)
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., looks downward as he is introduced at a campaign event at Thorngate Ltd., in Cape Girardeau, Mo., Tuesday, May 13, 2008.
(AP Photo/Jae C. Hong)
US Democratic presidential candidate Senator Barack Obama (D-IL) waits to speak at a campaign stop at the Thorngate Limited garment factory in Cape Girardeau, Missouri May 13, 2008, the night of the West Virginia presidential primary.
Democratic presidential hopeful Sen. Barack Obama, D-Ill., watches as he is introduced by Sen. Claire McCaskill, D-Mo., not pictured, at a town hall-style meeting held at Thorngate Ltd., in Cape Girardeau, Mo., Tuesday, May 13, 2008. (AP Photo/Jae C. Hong)
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., center, shakes hands with supporters at a town hall-style meeting held at Thorngate Ltd., in Cape Girardeau, Mo., Tuesday, May 13, 2008.
(AP Photo/Jae C. Hong)