In this April 15, 2012 photo, state Attorney General Jon Bruning, center, participates in a debate against state Treasurer Don Stenberg, right, and state Sen. Deb Fischer, left, in Omaha, Neb. The ... more 
In this April 15, 2012 photo, state Attorney General Jon Bruning, center, participates in a debate against state Treasurer Don Stenberg, right, and state Sen. Deb Fischer, left, in Omaha, Neb. The three top Republicans vying for Nebraska’s U.S. Senate nomination scrambled through a final full day of campaigning on Monday, May 14, 2012, as the race appeared to tighten and election officials predicted above-average turnout for the nationally watched contest. (AP Photo/Nati Harnik) less 
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Associated Press | Photo By Nati Harnik
Tue, May 15, 2012 1:52 PM EDT