The unlikely alliance unraveled in real time, with Trump telling reporters in the Oval Office he was “very disappointed” in the tech mogul’s criticism of his spending bill, and Musk railing against the president on X.

Donald Trump has launched a blistering attack on Elon Musk, accusing his billionaire backer of being “hostile” to his administration as a row between two of the world’s most powerful men erupted into an all-out, public feud.

Maybe it was always going to end this way, with two billionaires angrily posting about each other on social media, fingers flying across pocket-sized screens as their incandescent feud burned hotter by the minute.