President Barack Obama greets workers as he walks to the stage to deliver remarks, Thursday, July  15, 2010, at the groundbreaking ceremony at Compact Power, Inc., a subsidary of LG Chem Ltd., a battery plant in Holland, Mich. (AP Photo/Susan Walsh)

Photo by: Susan Walsh

President Barack Obama greets workers as he walks to the stage to deliver remarks, Thursday, July 15, 2010, at the groundbreaking ceremony at Compact Power, Inc., a subsidary of LG Chem Ltd., a battery plant in Holland, Mich. (AP Photo/Susan Walsh)