President Donald Trump announced that his administration is revoking a waiver that allows California to set its own greenhouse gas and vehicle fuel-efficiency limits for passenger cars.Detroit (and all the rest) have been handcuffed by California's Air Resources Board (CARB) regulations for emissions. Since California is a huge market, automakers have had to play by California rules which are far more strict than EPA rules for the rest of the country. By "more strict", I mean "nearly un-makeable."
They cannot afford to manufacture two different engines/propulsion systems for every car and truck in the lineup, plain and simple.
Taking California out means that the automakers can sell cars which meet national EPA goals--and they are tough--and ignore the Land of Fruits and Nuts' utterly ridiculous standards.