Sydney Morning Herald | Romney and Obama campaigns trade barbs, fight for key states Reuters * Reuters/Ipsos poll says Obama increased lead over Romney * Ad buy-tracking firm: 72 pct of spending for negative ads By Sam Youngman and Jeff Mason DES MOINES/DENVER, Aug 8 (Reuters) - President Barack Obama and his Republican rival Mitt Romney ... Romney compares California's economy to Greece Romney continues bashing Obama over welfare rules after Bill Clinton jumps to ... Welfare fight heats up, Gingrich joins the fray |