US President Donald Trump called a meeting of his cabinet secretaries this week to discuss Elon Musk and his efforts to reduce government spending and staffing.
Musk accused Secretary of State Marco Rubio of failing to sufficiently cut staff at the State Department, the New York Times reports.
The billionaire also clashed with Transportation Secretary Sean Duffy over whether Musk's Department of Government Efficiency (Doge) task force had tried to lay off air traffic controllers who were already in short supply at the Federal Aviation Administration.
The BBC analysis states that Duffy's department has been under scrutiny after two US airline crashes since Trump took office in January.
After hearing the back-and-forth, the Republican president reportedly intervened to make it clear that he still supported Doge, but from now on the cabinet secretaries would be in charge and the Musk team would only advise.
A State Department spokeswoman told the newspaper that the cabinet meeting was an "open and productive discussion."
The hastily scheduled meeting could provide evidence that the president has decided to limit the sweeping power that the SpaceX and Tesla chief and his Doge cost-cutting initiative have commanded in the early weeks of his administration.
Trump first commented on the content of Thursday's meeting, which was only revealed in media reports after the fact, through a post that evening on his social media page, Truth Social.
He said he had instructed secretaries to work with the Doge on "cost-cutting measures."
Several federal judges overseeing these cases have already expressed concern about Musk's authority, concerns that could be further fueled by Trump's comments during his address to Congress on Tuesday that the billionaire was, in fact, the man in charge of Doge.
Musk and Trump have formed a formidable partnership so far – as the richest man in the world and the most powerful politician in America.
Washington has been abuzz with speculation for months about whether this partnership could finally break down.
The dust rising in the cabinet room may be the first crack in the foundation, but there is plenty of evidence that Trump still supports Musk's broader efforts and goals, even if he may prefer to use a scalpel in the coming days, not a chainsaw./ BBC