I'm not sure even Tesla unambiguously qualifies here. Looking at the NHTSA part 583 list for 2025 [0], none of the Tesla vehicles have a "US" content higher than 75% (which I think includes Canada?). The highest is the base Kia EV6 at 80%. This seems to be coming from the Kogod manufacturing index. That's a more qualitative ranking that attempts to deal with things like corporate structures rather than just origin li…
I won't say that NAFTA is dead, but supply and production lines were designed with the assumption the parts could cross the borders any number of times without paying duty. The WSJ looked at the Ford 10-speed transmission used in the F-150 and it apparently crosses the Canadian border at least 3 times, paying different duties each time depending on the content (machined aluminum casting, steel planetary gear sets, subassemblies, etc.)
My guess is that by imposing tariffs on Canada and Mexico, the government is intending to block the Chinese firms who are attempting to back-door their way into the US economy by building factories in the traditional maquiladora areas. Bold move, let's see how it plays out.