FILE - In this Oct. 22, 2010, file photo Wisconsin's Democratic candidate U.S. Senator Russ Feingold, left, and Republican challenger Ron Johnson, right, participate in a senate debate in Milwaukee. ... more 
FILE - In this Oct. 22, 2010, file photo Wisconsin's Democratic candidate U.S. Senator Russ Feingold, left, and Republican challenger Ron Johnson, right, participate in a senate debate in Milwaukee. Johnson, an accountant, businessman and political newcomer, is running against Feingold, who has held the office for 18 years, in the November election. less 
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Associated Press | Photo By Jeffrey Phelps, File
Wed, Oct 27, 2010 4:05 PM EDT