AdvertisementOutside Groups Spend Big On Elections, But Don't Have Much To Show For It03:41Download AudioResumeNovember 07, 2012Peter OverbyfacebookEmailKarl Rove, former adviser to President George W. Bush, speaks last year in Corpus Christi, Texas. Rove is the chief fundraiser for the biggest outside spender this election season: the twin groups American Crossroads and Crossroads GPS. (AP)