Much as President Obama and other liberals may think natural laws for things like physics and economics don’t matter, the reality is they do and nowhere more so than on American highways. The president reportedly has secured agreements from Ford, Chrysler, General Motors, Honda and Hyundai to raise the Corporate Average Fuel Economy fleet average standard to 54.5 mpg by 2025. The new standard will be reviewed in 2018, but that won’t change the fact that automakers will immediately have to embark on efforts to lighten and downsize all of their models. Those that can’t be made sufficiently small to reach the required fleet average will go the way of the Model T.