Billionaire Elon Musk has said his time leading President Donald Trump's cost-cutting task force is coming "to an end". Musk has helped lead the Department of Government Efficiency - known as Doge - since its inception this year. He was designated as a "special government employee" - which allows him to work a government job for 130 days each year. Measured from Trump's inauguration on 20 January, he would hit that limit toward the end of May.