Paul Krugman has offered an excellent argument on the electorate's amnesia.
Romney is a throwback to G.W.Bush and his policies which created the problems the country now faces. Obama didn't create these problems as the Repubs would have you believe.

Romney operates in logic tight compartments. He believes in his mantra of business first, the savior of society. He is enamored of highly structured institutions that don't deviate from their designs even when the country is in peril.

This is why he is a Mormon. This is how he would run the presidency.