Since the election, Mr. Musk has used his social media company to talk up how bright the future will be under the president-elect.

Tech billionaire Elon Musk and his business empire stand to reap massive rewards if former President Donald Trump returns to the White House. But Musk, who has turned X into a pro-Trump echo chamber, will have unparalleled conflicts of interest if he ...

The billionaire owner of SpaceX was on the call briefly and his involvement wasn’t planned, according to those familiar with the conversation.