There is also CAFE standards that made small, effecient vehicles require extremely high emissions standards while allowing looser standards for larger, less effecient vehicles. Effectively limiting foriegn market influence while increasing both the price and size of the average vehicle on American roads.

Pretty sure big oil and car companies have been bailed out by the US government in the past. Plus america designs most of its cities so that you need to own a car. Seems like both markets are equally “free” at the end of the day.