President Obama tours the Ford Motor Co. Chicago assembly plant with Ford executive Mark Fields (left) and plant manager Jan Allman on Thursday, Aug. 5, 2010. The Chicago plant will begin production of a new 2011 Ford Explorer. (AP Photo/Pablo Martinez Monsivais)

Photo by: Pablo Martinez Monsivais

President Obama tours the Ford Motor Co. Chicago assembly plant with Ford executive Mark Fields (left) and plant manager Jan Allman on Thursday, Aug. 5, 2010. The Chicago plant will begin production of a new 2011 Ford Explorer. (AP Photo/Pablo Martinez Monsivais)