Democratic presidential candidate Sen. Barack Obama, D-Ill. speaks at Wayne County Community College District Downriver Campus in Taylor, Mich., Tuesday, June 17, 2008.
(AP Photo/Paul Sancya)
Democratic presidential candidate Sen. Barack Obama, D-Ill., listens as they talk with Marilyn Pace about her financial aid situation at Wayne County Community College in Taylor, Mich. Tuesday, June 17, 2008. (AP Photo/Alex Brandon)
Democratic presidential candidate Sen. Barack Obama, D-Ill. poses with students at Wayne County Community College District Downriver Campus in Taylor, Mich., Tuesday, June 17, 2008. (AP Photo/Paul Sancya)
Presumptive U.S. Democratic presidential candidate Barack Obama listens to college student Marilyn Pace and District Dean Marcus McGrew about the financial costs of going to school during a campaign stop at Wayne County Community College District in Taylor, Michigan June 17, 2008. REUTERS/Rebecca Cook
Democratic presidential candidate Sen. Barack Obama, D-Ill. receives a toothbrush from dental hygienist students at Wayne County Community College District Downriver Campus in Taylor, Mich., Tuesday, June 17, 2008. (AP Photo/Paul Sancya)
Democratic presidential candidate Sen. Barack Obama, D-Ill. laughs with students at Wayne County Community College District Downriver Campus in Taylor, Mich., Tuesday, June 17, 2008.
(AP Photo/Paul Sancya)
Democratic presidential candidate Sen. Barack Obama, D-Ill. steps off the bus to board the campaign plane at Detroit Metropolitan Airport in Romulus, Mich., Tuesday, June 17, 2008. (AP Photo/Alex Brandon)
Democratic presidential candidate Sen. Barack Obama, D-Ill., boards the campaign plane at Detroit Metropolitan Airport in Romulus, Mich., Tuesday, June 17, 2008. (AP Photo/Alex Brandon)