FILE - In this Sept. 17, 2012 file photo, President Barack Obama greets people after speaking at a campaign event in Cincinnati, Ohio. Ohio is the presidential race's undisputed epicenter, and it's tilting toward Barack Obama. The revival of the local economy and the popularity of Obama's auto industry bailout are hampering Mitt Romney's call for Ohioans to return to the GOP-leaning ways that were crucial to George W. Bush. (AP Photo/Carolyn Kaster, File)
