US Senator Elizabeth Warren has raised fresh concerns about the potential national security risks posed by Chinese crypto mining giant Bitmain, according to a recent report. Her inquiry highlights growing scrutiny of foreign technology firms operating within critical US infrastructure sectors.
In a letter addressed to Commerce Secretary Howard Lutnick, Warren requested detailed information on how the department is managing risks associated with Bitmain’s operations. The request includes access to internal communications and documents related to the company’s activities and any ongoing investigations.
The concerns stem from an earlier federal probe known as Operation Red Sunset, launched in 2024. Led by the US Department of Homeland Security, the investigation examined whether Bitmain’s specialized mining hardware could be remotely accessed for espionage or potentially disrupt the US power grid.
Ongoing Investigation and Rising Scrutiny of Bitmain
Reports indicate that the investigation remains unresolved, with its current status unclear. Cases involving national security often take years to conclude and may not always result in public enforcement actions. However, scrutiny around Bitmain has continued to intensify.
US authorities have previously halted shipments of Bitmain equipment and initiated related investigations into Chinese chipmakers with alleged ties to Huawei. Additionally, a 2024 federal review flagged the deployment of Bitmain mining machines near a US military base as a significant concern.
Despite regulatory pressure, Bitmain has been expanding its footprint. The company is reportedly planning to establish its first US-based ASIC manufacturing facility, with production expected to begin in early 2026 and scale up by the end of the year.
The issue also intersects with US politics and business interests. American Bitcoin Corp., backed by Eric Trump and Donald Trump Jr., previously agreed to purchase 16,000 Bitmain mining rigs in a deal valued at $314 million.
