in the '92 election they spent just $19 million. by 2000 it doubled to 51 million, quadrupled to 200 million in 2004 and in the 2008 presidential race they spent a record $300 million. last year the supreme court ruled that outside groups could raise unlimited money from corporations. >> the u.s. supreme court today overturned laws on the books for nearly a century and ruled that corporations can spend freely now on political campaigns. >> reporter: in the 2010 midterms outside groups spent $305 million. one of the biggest players? american crossroads and crossroads gps, founded by bush adviser karl rove and others. they spent $70 million in 2010, helping republicans take back the house. in 2012, they pledge to spend $120 million. the koch brothers maligned by the left say they'll spend 88