Tesla shares fell nearly 8% on Monday after CEO Elon Musk's plans to launch a new U.S. political party reignited concerns about his commitment to the company's future as it struggles with declining sales.

Coming into Monday trading, Tesla stock was up 25% since the Nov. 5 election, down 22% year to date, up 17% since news that Musk was likely to leave DOGE in early April, and down 8% since a spat broke out between Trump and Musk on social media in early June.

Musk has not released an official party platform and has reported a false filing of the proposed political party to the Federal Election Commission. Here's what you need to know about the America Party and what this means for Musk's electric car company: Tesla.