U.S. Senator Elizabeth Warren is asking the Commerce Department to clarify whether Bitmain has been investigated and whether the company’s Bitcoin mining machines could create national security risks. In a letter to Commerce Secretary Howard Lutnick, she also requested details on any communications involving Bitmain, the department, and members of the Trump family.
The immediate trigger is a $314 million purchase of 16,000 mining machines by American Bitcoin Corp, a company backed by Donald Trump’s son. Lawmakers are examining whether large deployments of foreign-made mining hardware inside the United States could introduce security concerns, especially in industrial-scale operations where thousands of machines run continuously.
Federal probe examined remote access and power system disruption
The scrutiny also reaches a federal investigation known as Operation Red Sunset. That probe looked into whether mining machines could be remotely accessed for surveillance or used to interfere with power systems. For officials reviewing critical infrastructure exposure, the issue is not only crypto mining itself but the possibility that network-connected hardware could create a channel for tampering or monitoring.
Past warnings are now back in focus. According to the report, Bitmain equipment used near a U.S. military base in 2024 was flagged as a potential risk. A 2025 Senate Intelligence Committee report also cited possible vulnerabilities and the chance that such hardware could be tampered with. The material cited in the coverage does not say those risks were confirmed in practice, but it does show that federal concern had already been building before this latest political push.
Bitmain rejects allegations as lawmakers seek more disclosure
Bitmain has denied the claims, saying the allegations are inaccurate and that it complies with all laws. American Bitcoin Corp said its own security checks found no problems with the machines. That has not ended the pressure. Lawmakers are still pressing for fuller disclosure on how the equipment is being used and what review processes were applied before deployment.
The dispute is broadening into a larger policy question around foreign crypto mining hardware in the U.S. market. Attention is shifting toward where machines are made, how they operate once installed, and whether imported mining equipment should face tighter oversight when national security and critical infrastructure are part of the discussion.