U.S. lawmakers are escalating scrutiny over cryptocurrency mining supply chains. On March 26, 2026, Senator Elizabeth Warren sent a letter to Commerce Secretary Howard Lutnick, demanding answers about the oversight of Bitmain, a Chinese bitcoin mining hardware manufacturer with ties to an enterprise involving Eric Trump. The concerns outlined in the correspondence center on potential infrastructure vulnerabilities and foreign influence risks associated with mining equipment deployed within the United States.
Warren Questions Bitmain's 'Unusual' Alliance with the Trump Family
Warren wrote that Bitmain's strategy, in the face of potential investigations, has reportedly been to enter 'an alliance with one of President Donald Trump's children,' specifically Eric Trump, co-founder of crypto mining firm American Bitcoin. 'In a recent interview, sitting next to his business partner Eric Trump, American Bitcoin CEO Michael Ho confirmed that Bitmain has been a leading manufacturer for us,' Warren noted. The letter also references federal assessments about whether such hardware could be remotely accessed or exploited within U.S. power systems.
Supply Chain Security and Export Control Controversy
The letter highlights that a Bitmain-affiliated company, Sophgo Technologies Ltd., was previously placed on the Commerce Department's blacklist for supporting China's advanced semiconductor ambitions. Bitmain dominates a large share of global mining hardware production and has been linked in past reports to Chinese state interests, raising broader concerns about supply chains and intelligence. Lawmakers emphasized that the department has authority over export controls and risks related to communication technology, placing it at the center of enforcement decisions involving foreign-linked crypto infrastructure. Counterarguments from industry players and Trump-linked officials describe the situation as a strategic attempt to boost domestic control over bitcoin mining capacity. Supporters argue that concentrating hashrate in the U.S. strengthens national security goals.
Financing Deals Raise Eyebrows: Hundreds of Millions in Future Bitcoin
Further scrutiny targets financial arrangements between Bitmain and American Bitcoin, including equipment deals structured around future bitcoin payments rather than cash. Warren asserted: 'Bitmain gave Eric Trump's American Bitcoin 'unusual' terms, including swapping equipment worth several hundred million dollars for future, 'pledged' bitcoin instead of cash, a deal that some industry experts considered 'particularly generous to American Bitcoin.' The letter closes by requesting documentation and responses by April 9, 2026, while stating: 'National security decisions about U.S. export controls and trade laws must be shielded from undue political influence.'
Eric Trump Reaffirms $1 Million Bitcoin Prediction
Separately, Eric Trump reiterated his bullish prediction that bitcoin will reach $1 million per coin, telling CNBC on February 18 that he has 'never been more bullish.' This statement contrasts with the ongoing regulatory scrutiny, highlighting the tension between the Trump family's expanding crypto business interests and growing political pressure.