Historically, Trump's public feuds with business leaders have led to increased market volatility and negative sentiment towards the companies involved. In this case, Trump's criticism of Elon Musk and the revocation of the EV Mandate may lead to a decline in investor confidence in Tesla and other electric vehicle manufacturers. The EV industry is highly dependent on government regulations and incentives, and Trump's actions may be perceived as a setback for the industry's growth prospects. Furthermore, the tweet's confrontational tone may exacerbate market jitters and contribute to a broader risk-off sentiment in the stock market. However, it's worth noting that the impact may be limited to the automotive sector and may not have a significant effect on the overall market. Key areas to watch include Tesla's stock price, the performance of other EV manufacturers, and the response of investors to Trump's regulatory policies.