Musk, who supported Trump's campaign and also served as an adviser to the White House, has criticized the tax and spending bill the president is pushing.

Trump late Monday night fought back, suggesting his administration may investigate Musk’s companies’ massive government contracts. On Tuesday at the White House, Trump said Musk risked losing “a lot more” than government subsidies and threatened that the Department of Government Efficiency that Musk once led may “go back and eat Elon.”

Once close billionaires continue their feud with Musk criticizing spending bill and Trump threatening an end to subsidies for Musk-owned companies