FILE - In this May 5, 2012 file photo, Sen. Sherrod Brown, D-Ohio speaks before a campaign rally for President Barack Obama at Ohio State University in Columbus, Ohio. Big money from outside interests is flowing into the campaign for Ohio&#39;s U.S. Senate seat. Nowhere is as much money being spent on a Senate race this year as in Ohio, where liberal Democrat Brown is seeking a second term, his fate to some degree dependent on how well President Barack Obama does in the states tossup presidential contest. (AP Photo/Mark Duncan, File)