Warren cited inadequate responses from federal prosecutors regarding the world’s largest cryptocurrency exchange in a letter co-authored by Democratic senators Mazie Hirono and Richard Blumenthal.
The letter demanded confirmation of Binance’s adherence to “ongoing requirements” from the $4.3 billion deal that resolved money-laundering and sanctions violations.
The senators criticized the Justice Department for failing to “meaningfully answer” questions Warren initially raised in May about settlement compliance.
Earlier this month, prosecutors confirmed Binance had paid required financial penalties but noted the company maintains continuing obligations under the agreement, including compliance program improvements.
However, the lawmakers wrote that “this response did not confirm whether or not Binance was, in fact, complying with these ongoing requirements.”
Authorities installed the monitor to oversee the exchange’s adherence to anti-money laundering and sanctions compliance requirements.
The deal required the exchange to pay $4.3 billion in penalties and accept ongoing regulatory oversight.
The settlement marked one of the largest enforcement actions against a cryptocurrency firm, as prosecutors sought to address compliance failures that allowed illicit financial activities to flourish on the platform.
The senators’ pressure campaign stressed ongoing congressional scrutiny of cryptocurrency regulation, despite the recent regulatory moves led by Trump signing the GENIUS Act into law.