They might be intended to stick, but I don’t think they will. Americans aren’t going to be happy paying $5K more for a new car, just to make a small number of autoworkers happy - and the retaliatory tariffs against our ag exports are going to be painful.
Plus, once the temporary exemption for Mexican/Canadian auto parts goes away (not as part of a USMCA re-negotiation - that’s part of the current tariff plan as soon as they revise their country-of-origin methodology to include parts as well as final vehicles), the economic case for U.S. production largely disappears for many of these vehicles. Unless the auto parts manufacturers start reshoring to the U.S. as well.