He may have already set the wheels in motion, including with this executive order:
https://www.whitehouse.gov/presidential-actions/2025/01/unleashing-american-energy/
Sec. 2. Policy. It is the policy of the United States:
(e) to eliminate the “electric vehicle (EV) mandate” and promote true consumer choice, which is essential for economic growth and innovation, by removing regulatory barriers to motor vehicle access; by ensuring a level regulatory playing field for consumer choice in vehicles; by terminating, where appropriate, state emissions waivers that function to limit sales of gasoline-powered automobiles; and by considering the elimination of unfair subsidies and other ill-conceived government-imposed market distortions that favor EVs over other technologies and effectively mandate their purchase by individuals, private businesses, and government entities alike by rendering other types of vehicles unaffordable;