I think they hung it on Republicans and by default McCain. I think they were careful NOT to mention McCain specifically because they knew he had tried to introduce a bill in the Senate to reign in Fannie and Freddie and that would have left the liberals wide open.
Well, in any case it worked. McCain's numbers started dropping when it was McCain that tried to stop the Fannie/Freddie bleeding. We need to reverse that perception and show voters how Obama, ACORN and other RATS pressured Fannie/Freddie and banks to make these sub-prime loans.