In the first major flex of his influence since Donald Trump was elected, Elon Musk brought to a sudden halt a bipartisan budget proposal by posting constantly on his X megaphone and threatening Republicans with primary challenges.
The social media warnings from the world's wealthiest man preceded Trump's condemnation of a measure negotiated by GOP House Speaker Mike Johnson, which effectively killed the stopgap measure that was designed to prevent a partial shutdown of the federal government.
Washington was scrambled a day after Musk's public pressure campaign. Trump on Thursday first declined to say whether he had confidence in Johnson. But later in the day, Trump praised him and House leaders for producing ''a very good Deal,'' after they announced a new plan to fund the government and lift the debt ceiling.
Before the new deal was reached, Congressional Democrats mocked their GOP counterparts, with several suggesting Trump had been relegated to vice president.
''Welcome to the Elon Musk presidency,'' Democratic Rep. Robert Garcia of California wrote on X.
What was clear, though, is Musk's ascendance as a political force, a level of influence enabled by his great wealth. In addition to owning X, Musk is the CEO of Tesla and Space X.
''There is no doubt he does wield a lot of influence over Republicans right now due to his proximity to Trump,'' said Chris Pack, former communications director for the National Republican Congressional Committee and the Senate Leadership Fund.
But Pack also said that Musk's threats pose potential risks for House Republicans, who begin next year with a five-seat majority that will shrink temporarily because of Trump's nomination of some GOP lawmakers to administration posts.