" In all House races, Republican-leaning outside groups spent $38 million on television, compared with $13 million by Democratic-oriented groups. But Democratic candidates outspent Republican ones, $97 million to $49 million. The Democratic Congressional Campaign Committee also outspent the national Republican Congressional Committee, $30 million to $26 million. "

So the amount spent BY DEMOCRATS AND THEIR SUPPORTERS was the greater amount, in the House races.