The U.S. Securities and Exchange Commission (SEC) has filed a lawsuit against Tesla Inc. (NASDAQ:TSLA) CEO Elon Musk, accusing him of failing to comply with a subpoena related to his 2022 Twitter stock purchase. Musk responded by calling for a comprehensive overhaul of regulatory agencies. Musk had previously expressed interest in buying all Twitter shares he didn't already own, but later changed his mind due to the prevalence of spam and fake accounts on the platform.