Nearly two years into the recession, opinion about which political party is responsible for the severe economic downturn is shifting, according to a new national poll.A CNN/Opinion Research Corp. survey released Friday morning indicates that 38 percent of the public blames Republicans for the country's current economic problems. In May, 53 percent blamed the GOP.According to the poll, 27 percent now blame the Democrats for the recession, up 6 points from May, and 27 percent now say both parties are responsible."The bad news for the Democrats is that the number of Americans who hold the GOP exclusively responsible for the recession has been steadily falling by about two to three points per month," said Keating Holland, CNN polling director. "At that rate, only a handful of voters will blame the economy on the Republicans by the time next year's midterm elections roll around.."