President Barack Obama, followed by Sen. Debbie Stabenow, D-Mich., and Sen. Carl Levin, D-Mich.,  arrive at Detroit Wayne County Airport in Detroit, Friday, July 30, 2010. (AP Photo/Pablo Martinez Monsivais)

Photo by: Pablo Martinez Monsivais

President Barack Obama, followed by Sen. Debbie Stabenow, D-Mich., and Sen. Carl Levin, D-Mich., arrive at Detroit Wayne County Airport in Detroit, Friday, July 30, 2010. (AP Photo/Pablo Martinez Monsivais)