President Donald Trump and Tesla CEO Elon Musk are trading barbs after the billionaire criticized the Republican spending bill making its way through Congress.

During an Oval Office meeting with the German chancellor, Trump said he was "very disappointed" in Musk, who has repeatedly railed against the bill.

"Elon knew the inner workings of this bill better than almost anybody sitting here," Trump said on Thursday.

He added, "All of a sudden, he had a problem, and he only developed the problem when he found out that we're going to have to cut the EV mandate."

Musk, who recently served as an adviser to the president, refuted those statements.

"False, this bill was never shown to me even once and was passed in the dead of night so fast that almost no one in Congress could even read it!"

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