A foreign nation dumping massive volumes of their heavily subsidized production onto your local market and putting your domestic producers out of business is not a good thing for any nation. If China could produce EVs far cheaper than the United States without using vast amounts of coal, and without those heavy subsidies on the whole supply chain let alone on manufacturers directly, then there's a free market argument for going tariff free, but as it stands going tariff free would be just letting dirty, unfair competition to go unchecked. It'd be political suicide let alone national industrial suicide.