Senator Maria Cantwell, D-Wash., wants hearings to force AT&T and Verizon to disclose how they’ve responded to the hacks to protect telecom networks.

The lawmakers say the January purge has left the United States blind on the nature of the historic Salt Typhoon telecommunications breach.

Seven sources tell CyberScoop that a lack of coordination and miscommunication between federal agencies and the telecommunications industry left critical networks exposed to the Chinese hacking group.

Troy Edgar told lawmakers that the Cyber Safety Review Board, which was investigating the Salt Typhoon hack, was “going in the wrong direction.”

Not everyone opposed the move, however, even as the board reviews the major Salt Typhoon telecom breach.

The proposed rules are a response to Salt Typhoon’s breach of at least eight U.S. telecom companies.

The reported scope of the Salt Typhoon hacks has expanded in recent days and weeks, from the incoming president to top U.S. officials.

Brad Smith defended the company at a time of growing concerns about whether the tech giant is sufficiently prioritizing security.

Some experts are doubtful the Homeland Security Committee testimony and questioning of Microsoft chief Brad Smith will lead to significant change.

The Homeland Security Committee plans a May 22 hearing.