Korean battery makers need to be wrecked, as much as korean ssd flash and sdram makers need to be wrecked.Here is the problem. The Republicans don't want America to get into evs, because they think it will help china. The democrats want to get into evs, but they bought into the big 3 bs that legacy auto can take over the market. They have no concept of how much the entire ev supply chain depends on china. The entire industry only has 2 viable paths to batteries: china and Korea. And the Koreans rely on Chinese supply chain, because the biggest market in the world is china. So unless Koreans are willing to set up separate supply chain that's china free, there is no avoiding china. America is too small of a market to warrant special treatment at the moment.
Other problem is that you can never achieve low cost production of evs until you rely on Chinese supply chain. You can never scale up production until you rely on Chinese supply chain. So you are going to get a situation where Tesla continue to expand in Shanghai and exporting production there to rest of the world. It doesn't matter that Tesla will probably need to pay 10% tariff to export to Europe since the production cost at Shanghai is so much lower than Berlin. At some point, it's going to make sense for Tesla to export cars from Shanghai to America even with the tariffs.