Elon Musk says he will step back next month from his work with the Department of Government Efficiency to focus more time on Tesla, after the electric carmaker's profits plunged 71%.

Tesla boss Elon Musk says he will cut back his role in the Trump administration as the company's profits and revenues plunged during the first three months of the year. Sales slumped and the brand has faced backlash as Musk became a political fixture in the White House.