Trump just took his public feud with Musk to a new level: Going after his money

President Donald Trump on Thursday threatened Elon Musk’s federal contracts, a remarkable escalation in a public feud between the president and the world’s richest man, his former ally.

“The easiest way to save money in our Budget, Billions and Billions of Dollars, is to terminate Elon’s Governmental Subsidies and Contracts,” Trump wrote on his social media platform Thursday afternoon. “I was always surprised that Biden didn’t do it!”

The president’s relationship with Musk has deteriorated rapidly since Musk left the White House last week. The acrimony went public when Musk publicly slammed Trump’s sweeping domestic policy package on Tuesday.

Musk responded to the broadside by announcing his company, SpaceX, will withdraw from service its Dragon spacecraft — which is critical to the American space program.

"In light of President Trump's statement about cancellation of my government contracts, @SpaceX will begin decommissioning its Dragon spacecraft immediately," Musk wrote on X, the social media site he owns.

Musk's threat would deprive the U.S. of its only assured way of supplying the International Space Station and bringing on and off astronauts. If executed, NASA would instead have to rely on Russia to bring supplies and astronauts to the station. NASA had contracted with Boeing on the Starliner, a competitor to the Dragon spacecraft, but that system is temporarily out of service following problems with the craft.

He’s continued to lash out at the White House in the days since — with Musk baiting Trump by name earlier Thursday, and Trump responding by chastising the Tesla CEO from the Oval Office later in the day.

Still, Trump’s criticism from the White House — where the two men less than a week ago shared a laudatory sendoff for Musk — was not as pointed as the president’s barbs on social media.

“Without me, Trump would have lost the election, Dems would control the House and the Republicans would be 51-49 in the Senate,” Musk wrote on X Thursday. “Such ingratitude.”

Musk’s companies have significant ties to the federal government, even before the Trump administration. SpaceX is one of NASA’s largest contractors. And his car company Tesla benefitted from a clean energy subsidy that is on the chopping block in Republicans’ reconciliation package.

“Elon was ‘wearing thin,’ I asked him to leave, I took away his EV Mandate that forced everyone to buy Electric Cars that nobody else wanted (that he knew for months I was going to do!), and he just went CRAZY!” Trump posted.

“Such an obvious lie. So sad,” Musk fired back.

Trump has previously boosted Tesla because of his close relationship with Musk. In March, with the company’s stock at a low after public anger over job cuts fueled by Musk’s DOGE initiative, the president toured different Tesla models at a makeshift car show on the White House lawn. Trump later purchased his own Tesla, “a show of confidence and support” for Musk.

Tesla's stock tanked on Thursday, falling more than 14 percent as the two traded barbs.

Trump has routinely wielded the power of the executive branch against institutions that he deems are misbehaving. He’s frozen billions in federal grants to some of the country’s top universities, Harvard chief among them, as punishment for alleged antisemitism and civil rights violations. And he’s secured multimillion dollar deals with law firms weary of his threats to tank their business.

Sam Skove contributed to this report.