Billionaire Elon Musk’s DOGE team is expanding use of his artificial intelligence chatbot Grok in the US federal government to analyse data, said three people familiar with the matter, potentially violating conflict-of-interest laws and putting at risk sensitive information on millions of Americans. Such use of Grok could reinforce concerns among privacy advocates and others that Musk's Department of Government Efficiency team appears to be casting aside long-established protections over the