Elon Musk’s Department of Government Efficiency has been Donald Trump’s battering ram during the president’s first 100 days, slashing the federal government and trying to bend its remnants to Trump’s will.

Elon Musk's Department of Government Efficiency (Doge) - set up to cut US government spending - claims to have saved, on average, more than $10bn a week since President Trump entered office. "We're talking about almost $200bn and rising fast," Trump told the BBC when talking about Mr Musk's cost-cutting drive on 23 April.

The billionaire head of the U.S. DOGE Service clashed with Trump Cabinet officials well before he announced he would soon head back to Tesla.