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

Musk has called to “kill” Trump’s policy bill, criticizing the legislation as “massive, outrageous” and “pork-filled.”

The breakup between the president of the United States and the world’s richest man is unfurling much like their relationship started — rapidly, intensely and very publicly. As…