FARS, the government’s own Fatal Accident Reporting System for all fatal accidents in the US, consistently (for several decades) shows that small cars have about THREE times the fatality rate as big cars. This includes single car crashes, which includes a large percentage of the fatalities. Whatever is done to make a small car safer can also be done to a big car, making the big car three times safer, still. The laws of physics cannot be repealed, even by Obama.
He's still going to try.