This is probably the end of the traditional US Auto industry. It's hard to see how it survives these tariffs. The back and forth nature of automobile manufacturing with Canada is evolutionary and necessary for the modernization of the industry. Reversing course is just untenable - but the costs incurred by these tariffs will price these cars out of the market. I assume Trump, et al will tariff other vehicles from foreign manufacturers who bring parts in from overseas and assemble in the USA - like VW, BMW, etc. Eventually, the price of a car will be so expensive that the average person will not be able to afford an automobile. Meanwhile, Chinese automakers will thrive in this environment as tariffs and retaliatory tariffs make all US cars uncompetitive. And Chinese automakers take over the world....especially in Europe and throughout Asia.
I rode in my first BYD over the weekend. It's not a very comfortable car - but it's cheap and it works....feels like a Tesla but considerably more affordable.
The tariff situation is so baffling because it is so clearly wrong headed and economically unsound. You can apply my comments above to basically every industry Trump gets his little fingers on.