The spread is still about 15 points and hasn't changed much in the last two years - at least the way Gallup asks the question.
Americans continue to place more blame for the nation's economic problems on George W. Bush than on Barack Obama, even though Bush left office more than three years ago. The relative economic blame given to Bush versus Obama today is virtually the same as it was last September.
Changing this dynamic is up to Romney and the Super Pacs. Obama has had a free ride on this issue for three years and a massive ad campaign that would tell the true story of the economy and how it has been mismanaged over the last three years by the Obama administration is the only way to flip those numbers.
It's a key to a Romney victory to get the public thinking about Obama's policies and their negative effect on the economy. Given the resources available, they should be able to accomplish it.