I think one reason for that is since we are headed for even worse economic and foreign policy problems before anything can get better and with a “president Romney” conservatives will get the lion’s share of the blame for it. That almost happened to Presidents Reagan and Bush 44 before they overcame.
Far better a President Romney than four more years of Obama to deal with the looming economic and foreign policy problems. We have the most racist, radical, incompetent President ever to occupy the WH. He is hell bent on transforming this country and won’t let the law or the Constitution stand in his way.