Three U.S. government employee unions filed a lawsuit Monday against the Treasury, alleging that its sharing of confidential information with the Elon Musk-run Department of Government Efficiency violated the law.

Wendy Edelberg of Brookings says "political malpractice" might be a bigger risk to economic stability than the government's massive borrowing.

In a letter to the Treasury secretary, the Democratic senator warned against meddling with a system that processes trillions of dollars of transactions.