Elon at least seems to be against sudden implementation of tariffs, he wants them phased in in a predictable over time, he talks about exactly this near the end of his JRE interview: https://youtu.be/7qZl_5xHoBw?si=0XNnSP8psUtXLK2K&t=8426

They also talk about the problems of losing competitive pressure from protectionist systems.