Senator Elizabeth Warren is taking aim at what she believes is an overlooked risk lurking in the balance sheets of America’s financial institutions: their exposure to artificial intelligence companies.

Warren introduced a bill that would require financial institutions to disclose how much they’ve lent to, invested in, or are otherwise financially entangled with AI companies. The move is the latest escalation in a campaign she’s been building for months, one that frames AI infrastructure spending as a potential systemic threat to the financial system.

The trillion-dollar concern

Warren has been sounding the alarm on AI-related debt for a while now. In January 2026, she led a coalition of senators, including Richard Blumenthal, Tina Smith, and Chris Van Hollen, in sending a letter to the Financial Stability Oversight Council urging an investigation into what they described as more than $1 trillion in debt tied to AI infrastructure buildouts.

By April 2026, Warren had sharpened her rhetoric further. Speaking at a Vanderbilt Policy Accelerator event on April 22, she projected the potential AI bubble could swell to $3 trillion.