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MIDDLETON, WI - NOVEMBER 2: Democratic candidate for Wisconsin, Russ Feingold concedes to Republican candidate Ron Johnson during his election night party in the midterm elections on November 2, 2010 in Middleton, Wisconsin. (Photo by Darren Hauck/Getty Images)

MIDDLETON, WI - NOVEMBER 2:   Democratic candidate for Wisconsin, Russ Feingold concedes to Republican candidate Ron Johnson during his election night party in the midterm elections on November 2, 2010 in Middleton, Wisconsin.  (Photo by Darren Hauck/Getty Images)