"For now, all of this is speculation, as there's no official word from Volkswagen Group and any tariffs have not been finalized. However, it's easy to see that, given the potential for these increased costs, automakers may considering some dramatic shifts when it comes to where vehicles are made."
With that blurb from the article; automakers, including US ones, understand it just makes sense to build product in the country where they sale that product the best. If anyone travels abroad, you will see overseas US companies with brands of cars they don't even sale in the states. The article is talking about particular cars that sale well in the US. Their companies builds here, our companies build there.