President Donald Trump hit back on Elon Musk following Musk’s rampage against his domestic megabill, saying on Thursday he’s “very disappointed” in the Tesla billionaire.

“Look, Elon and I had a great relationship. I don’t know if we will anymore,” Trump said.

Musk responded to the comments in real time on X, where he continued to swipe at the legislation and at Trump directly.

“Where is this guy today??” Musk wrote as he reupped another user’s compilation of past Trump tweets criticizing high deficits, unbalanced budgets and more.

At one point, Musk responded to a user: “Without me, Trump would have lost the election, Dems would control the House and the Republicans would be 51-49 in the Senate.”

The president was asked about Musk’s relentless criticisms of the tax and immigration bill while taking reporter questions alongside German Chancellor Friedrich Merz in the Oval Office.

“He hasn’t said anything about me that’s bad. I’d rather have him criticize me than the bill, because the bill is incredible,” Trump said of Musk.

The “One Big Beautiful Bill Act” passed the House last month by a single vote. The measure would extend Trump’s 2017 tax cuts and boost spending for the military and border security, while making some cuts to Medicaid, SNAP and other assistance programs.

It now faces headwinds in the Senate, specifically among a small group of Republican fiscal hawks.

Musk has said the the legislation, estimated by the nonpartisan budget office to add $3 trillion to the deficit over the next decade, would undermine the Department of Government Efficiency’s goal to reduce government spending and trim the national debt.

Trump contended on Thursday that Musk, the CEO of Tesla, was really “upset” because the legislation would remove tax credits for electric vehicles.

“But I’m very disappointed because Elon knew the inner workings of this bill better than almost anybody sitting here, better than you people,” Trump said. “He knew everything about it. He had no problem with it. All of a sudden, he had a problem.”

Musk pushed back on X and suggested Trump was not telling the truth.

“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!” he wrote.

In another post, Musk wrote: “Whatever.”

“Keep the EV/solar incentive cuts in the bill, even though no oil & gas subsidies are touched (very unfair!!), but ditch the MOUNTAIN of DISGUSTING PORK in the bill,” the post read.

“In the entire history of civilization, there has never been legislation that both big and beautiful,” Musk added. “Everyone knows this! Either you get a big and ugly bill or a slim and beautiful bill. Slim and beautiful is the way.”