Tech billionaire Elon Musk has publicly denounced U.S. President Donald Trump’s signature tax and spending bill as a “disgusting abomination,” marking his first public disagreement with the administration since his abrupt departure last week.

In a series of posts on X (formerly Twitter) on Tuesday, Musk called the multi-trillion dollar legislation “outrageous, pork-filled” and warned it would “massively increase the already gigantic budget deficit to $2.5 trillion (!!!) and burden America’s citizens with crushingly unsustainable debt.” He concluded with a political warning: “In November next year, we fire all politicians who betrayed the American people.”

Musk’s comments came after he left the administration on May 31, having worked for 129 days with his team, “Doge,” on cost-cutting measures. Previously, he had only described the plan as “disappointing.”

The “big beautiful bill,” as Trump refers to it, includes extensive tax cuts passed in 2017, increased defense spending, and provisions for mass deportations of undocumented immigrants. It also proposes lifting the debt ceiling to $4 trillion.Estimates suggest it could increase the budget deficit by approximately $600 billion in the next fiscal year.

White House Press Secretary Karoline Leavitt responded to Musk’s criticism by stating, “the President already knows where Elon Musk stood on this bill,” and reiterated Trump’s stance that it is “one, big, beautiful bill.”

Musk’s criticism highlights broader tensions within the Republican Party regarding the bill, which faced stiff opposition during its passage through the House of Representatives and continues to spark divisions in the Republican-controlled Senate. Senator Rand Paul, for instance, has vowed not to support the bill if it includes raising the debt ceiling. Trump, in turn, sharply criticized Paul on social media.

Republican leaders, including Senate Majority Leader John Thune and House Speaker Mike Johnson, have pushed back against Musk’s remarks. Johnson revealed he had a 20-minute phone call with Musk on Monday, expressing surprise at the criticism given their discussion, especially concerning the bill’s phasing out of electric vehicle tax credits, which could affect Musk’s firm, Tesla.

Some Democrats, despite their previous criticism of Musk, welcomed his comments. Senate Minority Leader Chuck Schumer remarked, “Even Elon Musk, who’s been part of the whole process, and is one of Trump’s buddies, said the bill is bad. We can imagine how bad this bill is.”

Trump and congressional Republicans have set a July 4 deadline to pass and sign the measure into law. While Musk had supported Trump in last year’s November election with significant donations, his recent posts suggest a growing rift. To appease spending hawks, Trump is also reportedly pushing Congress to pass a separate plan to reduce current spending by $9 billion, reportedly based on Doge’s work.