The sudden fallout ended a nearly yearlong partnership, during which Mr. Musk helped propel Mr. Trump to the White House and became one of the president’s top advisers.
Elon Musk and President Trump openly feuded over the Republican domestic policy bill on Thursday, with Mr. Trump criticizing Mr. Musk during an Oval Office meeting with the chancellor of Germany, and Mr. Musk replying in kind on his X, the social media platform he owns.