"In the building behind me, Elon Musk is seizing power away from the American people," Warren told hundreds gathered outside the Treasury. The show of protest came as Democrats in Congress are struggling,

A group of congressional leaders attempted to get into the Treasury Department Tuesday but were reportedly told workers had to see if they were allowed inside.

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