FILE - In this Aug. 10, 2012, file photo Republican candidates former Wisconsin Gov. Tommy Thompson, center, talk to members of the television audience after a candidates' debate in Madison, Wis. Even... more 
FILE - In this Aug. 10, 2012, file photo Republican candidates former Wisconsin Gov. Tommy Thompson, center, talk to members of the television audience after a candidates' debate in Madison, Wis. Even with the name of Thompson, the biggest name in modern Wisconsin politics, on the ballot, the Republican primary in a highly competitive U.S. Senate race appears headed for a fractious four-way battle. (AP Photo/Andy Manis, File) less 
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Associated Press | Photo By Andy Manis, File
Sun, Aug 12, 2012 11:40 AM EDT