Shares of Elon Musk’s electric vehicle maker are falling sharply Thursday as investors fear his dispute with Donald Trump could end up hurting the company.

A breakdown in relations between President Trump and Elon Musk slammed Tesla stock Thursday, along with assets associated with the U.S. leader. Tesla shares regained some ground early Friday. Shares of Musk’s electric-vehicle maker rose around 4% in morning trading.

Elon Musk and Donald Trump hurled insults at each other all day on Thursday after the president’s former ally attacked the bill containing his entire legislative agenda. And though Musk had somewhat backed off his hardline stance a few hours later,