The effort faces an uncertain future in a largely frozen Congress that has passed few bills since President Donald Trump took office in January.

Billionaire Elon Musk said he is considering sending his government efficiency team to the Federal Reserve, citing a costly renovation of the central bank’s Washington, DC, headquarters as an example of potential government waste.

Tesla boss Elon Musk has pledged to "significantly" cut back his role in Doge, the body tasked with reducing US government spending and cutting jobs. The Department of Government Efficiency has faced legal challenges over the scope of its work, and Musk and his team have been been criticised for a lack of transparency.