Elon Musk has long shown success running multiple companies. Yet, now, his businesses might need him to do more than cut back on government work.

Tesla boss Elon Musk has pledged to "significantly" cut back his role in the US government after the electric car firm reported a huge drop in profit and sales for the start of this year. Musk has led the newly created advisory body - the Department for Government Efficiency (Doge) - since last year,