That's essentially the message Mitt Romney has to hammer home Wednesday night, and for the remainder of the campaign.
Here's an interesting article by Mary Katharine Ham over at Hot Air on that point, among other things. It cites several whoppers Obama and his supporters and ads keep repeating- busted as lies by, of all people, the liberal Washington Post- whose Fact Checker awards the president three Pinocchios for his claim that it was the Bush tax cuts and "trickle-down economics" which led to the collapse of the economy.
And here's Chris Christie saying the same thing to a clueless George Stephanopoulos:
HT: Real Clear Politics