Cars aren't like iPhones, and shipping cars across oceans really only makes sense for luxury vehicles, which is the real reason why Chinese cars aren't available in the U.S. yet.

Most non-luxury foreign cars available for sale in the U.S. are actually assembled in factories in Mexico or the United States.

If Ford wanted to sell cars to the E.U. (competitively), they'd design smaller models and manufacture them in Europe. If BYD wants to sell cars in the U.S., they'll built out a plant in Mexico.