In this photo taken Oct. 2, 2012, Catherine Gatewood, foreground, and Karen Diehl call potential voters from a Republican phone bank, in Cincinnati. Winning Ohio is complicated, with it

 

              In this photo taken Oct. 2, 2012, Catherine Gatewood, foreground, and Karen Diehl call potential voters from a Republican phone bank, in Cincinnati. Winning Ohio is complicated, with it
In this photo taken Oct. 2, 2012, Catherine Gatewood, foreground, and Karen Diehl call potential voters from a Republican phone bank, in Cincinnati. Winning Ohio is complicated, with its variety of voter groups and swinging trends. Diverse in geography, economy and demographics, Ohio is a state that one political scientist says offers a fairly close mirror of the nation. History and electoral math say the swing state is pivotal again this year, and probably crucial for Mitt Romney to win. President Barack Obama is trying to repeat his 2008 victory. (AP Photo/Al Behrman)