Democratic senate candidate Bob Kerrey, right, campaigns in the Benson neighborhood of Omaha, Neb., Tuesday, May 15, 2012. Kerrey, who is running for the U.S. senate seat vacated by democrat Ben ... more 
Democratic senate candidate Bob Kerrey, right, campaigns in the Benson neighborhood of Omaha, Neb., Tuesday, May 15, 2012. Kerrey, who is running for the U.S. senate seat vacated by democrat Ben Nelson, will face the winner in the republican primary election. (AP Photo/Nati Harnik) less 
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Associated Press | Photo By Nati Harnik
Wed, May 16, 2012 3:42 AM EDT