"...people will believe them" Maybe.
Not enough people consider that Democrats have run the show in Congress and the Senate since January 2007, and that isn't going to change. But even the thickest voter may eventually realize that the huge spending increases, tax hikes, and attacks on capitalism and business since the election aren't something Bush did.
Obama's approval rating on the economy in a July 9-12 CBS News Poll is 48 percent, down from a high of 61 about three months ago.