#TrumpVsMusk Donald Trump and Elon Musk’s feud reignited this week with the former political allies trading sharp public threats of retribution. The blowup, centered around Musk’s opposition to Trump’s signature tax bill as it moves through Congress, ends a period of rapprochement between two of the world’s most powerful men.

Musk posted escalating attacks against Trump’s sweeping spending bill on his social media platform X, calling the legislation “insane” and vowing to form a new political party if it passed late Monday. In response, Trump claimed he could “look into” deporting the South Africa-born billionaire, while also suggesting he could cut government subsidies for Musk’s companies or set the so-called “department of government efficiency” (Doge) on its former leader.

“Doge is the monster that might have to go back and eat Elon. Wouldn’t that be terrible?” Trump asked reporters on Tuesday.

Musk’s attempt to derail the tax bill was a major factor in his falling out with the president last month, and the Tesla CEO’s renewed offensive comes at a sensitive time as Trump seeks to shepherd the legislation through Congress. The fight could test Musk’s political influence over the Republican party as he seeks to peel away votes for the bill, as well as further deteriorate his once-close relationship with Trump.