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

Tesla Inc.’s shares sank as Elon Musk and President Donald Trump’s simmering feud devolved into a public war of words between two of the world’s most powerful people.Trump on Thursday said he was “very disappointed” by the Tesla chief executive officer’s criticism of the president’s signature tax policy bill.

Musk responded on social media in real time. Trump ratcheted up the stakes when he turned to his own social media network, Truth Social, and threatened to use the U.S. government to hurt Musk’s bottom line with his internet company Starlink and rocket company SpaceX.