Internal email lists and other documents and interviews provide the widest view so far of who is working in DOGE — and officials inside other agencies with Musk connections.

DOGE’s earlier actions at the Treasury have become a focus of congressional scrutiny and a federal court battle in recent days. Musk’s team initially tried to halt money going to the U.S. Agency for International Development from the Treasury’s payment system.

Elon Musk’s incursion into the federal government is unprecedented. It’s also pretty good news for his companies.