Actually, Trump already has. During the week he got rid of Obama's CAFE rules on progressively cleaner vehicles and replaced them with SAFE [I kid you not]. Basically, it allows legacy vehicle manufacturers to produce cars in North America that will be more polluting than under Obama's CAFE reductions. GM, Ford, etc wanted the change. All European manufacturers and Kia/Hyundai from Korea, selling in the USA opposed it, because they could reach the CAFE standards, which were laxer than European standards, and now certainly will be more so. The rules do not directly affect vehicle manufacturers like Tesla, Rivian, Lucid, BYD, Byton, Nio, Proterra, and several others, who ONLY produce electric vehicles. However, because the legacy manufacturers won't have to spend money on R&D in order to make their cars far less polluting, they might make cheaper cars and they might steal a few sales off EVs. In truth, I don't think it will make too much difference. The writing is on the wall - the oil industry has had its time. Time to start bowing out.