My guess is that the backlash was factored in. Even prior to his government role, Elon had stated plans to quit Tesla and take all their ML tech and engineers to xAI (if they didn't give him the 55b pay package), so he has at least one backup plan we know about. He also has more ownership over SpaceEx than Tesla which gets its money from the government, so backlash from customers doesn't really matter to him in the grand scheme of things. However, that's just a worst-case scenario, more likely is that sales will recover as the news-cycle wanes and new subsidies entice MAGA buyers.