The neuroscientist, whose company was partly bankrolled by Musk, gave Trump a shocking heads-up of what the president can expect from the tech mogul in the future.

Musk's latest wave of criticism came as Trump's 'big, beautiful bill' went through provisional rounds of voting in Congress over the weekend.

WASHINGTON (AP) — Elon Musk on Saturday doubled down on his distaste for President Donald Trump’s sprawling tax and spending cuts bill, arguing the legislation that Republican senators are scrambling to pass would kill jobs and bog down burgeoning industries.