Investor Ross Gerber believes that Elon Musk's possible exit from the White House wouldn't be enough to solve Tesla's issues.Gerber thinks Tesla needs a new CEO who is a great communicator and can refocus the company's identity.He believes Tesla's brand issues go beyond Musk's government role and include controversial statements made by Musk and recent controversies.Gerber predicts Tesla's stock could correct another 50% and suggests that getting a new CEO is one of the only ways for the company to move forward.