Trump is 'very disappointed' with billionaire Elon Musk, who accused the president of being 'ungrateful'.

US President Donald Trump said he was "very disappointed" with Elon Musk after the tech billionaire criticized his tax and spending bill.

Musk, CEO of Tesla and SpaceX, and owner of the social media platform X, recently resigned from his leadership position at the Department for Government Effectiveness (DOGE) – an agency established by Trump during his second term to implement widespread federal spending cuts.Mr. Musk said he would return to focusing on his business projects.

The billionaire criticized the bill, known as the "Big Beautiful Bill," arguing that it increases public debt and therefore contradicts DOGE's objectives.

Speaking to reporters on June 5, Trump said that Musk – whom he claimed "knows everything" about the bill – suddenly had a problem with it "when he found out that we're going to have to cut back on electric vehicle regulations, because that's billions and billions of dollars…"

He added: "And if you see the statements he made about me… I am very disappointed in Elon. I helped Elon a lot."

Musk has intensified his attacks on Trump's tax cut bill, claiming this week that it would plunge America into "debt slavery" and urging lawmakers to "repeal the bill."

The House passed the president's key bill in May, and Trump aims to sign the final version before Independence Day on July 4, while awaiting Senate approval.

Musk refuted Trump's claim that he knew more about the bill than anyone else, posting on X that it was "false" and adding that he had never even seen the bill.

In another post, the billionaire escalated the situation by accusing the president of being "ungrateful.""Without me, Trump would have lost the election, the Democrats would have controlled the House of Representatives, and the Republicans would only have a 51-49 majority in the Senate," he wrote.

The bill, strongly supported by Mr. Trump, seeks to make the 2017 tax cuts permanent and introduce deeper tax breaks, while also increasing spending in areas such as defense and border security.

Critics warn that it would disproportionately benefit the wealthy and significantly exacerbate public debt. An analysis by the U.S. Congressional Budget Office (CBO) released this week forecasts the bill would add $2.4 trillion to the deficit over the next decade and leave an additional 10.9 million Americans without health insurance by 2034.

Musk, who is credited with helping achieve an estimated $175 billion in savings through agency closures and workforce reductions under the DOGE initiative, has expressed concern that the bill's provisions could undo those gains.