An intense public feud erupted on Thursday between President Donald Trump and his one-time ally, billionaire Elon Musk, with an argument about Trump’s massive tax and domestic policy bill raging across social media and in the Oval Office.

In an interview with NBC News, the president also said he assumes his relationship with the tech billionaire is over after their recent falling-out.

President Donald Trump and billionaire Elon Musk are showing no signs of reconciling on Friday, but Republicans are increasingly urging them to settle their dispute.