Sen. Elizabeth Warren has pushed the U.S. Commerce Department to account for its oversight of Bitmain, putting the Chinese bitcoin mining hardware giant and its business ties to Eric Trump-linked miner American Bitcoin under sharper scrutiny. The Senate Committee on Banking, Housing, and Urban Affairs said on March 30, 2026 that Warren sent a letter dated March 26 to Commerce Secretary Howard Lutnick asking how the agency is handling the risks tied to Bitmain’s U.S. connections.
Letter focuses on mining hardware, foreign influence, and political links
Warren’s letter said Bitmain, while facing potential investigations, reportedly sought “an alliance with one of President Donald Trump’s children,” identifying Eric Trump as the relevant figure. Eric Trump is listed in the article as a cofounder of the crypto mining company American Bitcoin.
She also cited a recent interview in which American Bitcoin CEO Michael Ho, seated next to Eric Trump, said Bitmain “has been a leading manufacturer for us.” That statement became part of Warren’s broader argument that mining machines deployed in the United States may present infrastructure vulnerabilities and foreign influence risks. The letter also referred to federal reviews examining whether this hardware could be remotely accessed or exploited through U.S. power systems.
Export controls and prior federal action widen the dispute
The dispute goes beyond one supplier relationship. Warren’s letter referenced Sophgo Technologies Ltd., described in the source material as a Bitmain affiliate that was previously placed on a Commerce Department blacklist for supporting China��s advanced semiconductor ambitions. The same document said Bitmain controls a large share of global mining hardware production and has been linked in earlier reports to Chinese state interests, drawing supply chain and intelligence concerns into the debate.
That puts the Commerce Department in a central role. Lawmakers argued that the agency’s authority over export controls and communications technology risks makes it responsible for key enforcement decisions involving foreign-linked crypto infrastructure. Warren asked for records and responses by April 9, 2026, adding that national security decisions involving U.S. export controls and trade law must be insulated from improper political influence.
Financing terms with American Bitcoin draw separate scrutiny
Warren also questioned the financial structure of Bitmain’s dealings with American Bitcoin. In the letter, she alleged that Bitmain offered “unusual” terms, including an arrangement in which equipment worth hundreds of millions of dollars would be exchanged for future pledged bitcoin instead of cash. She said some industry experts viewed that structure as “distinctly generous to American Bitcoin.”
Supporters of the arrangement have framed the issue differently. Industry participants and Trump-aligned officials said the strategy is part of a broader effort to increase domestic control over bitcoin mining capacity in the United States. Commerce leadership and advisers have promoted the idea that concentrating more hash rate in the country supports national security goals. American Bitcoin executives, including Ho, have pointed to Bitmain as a major equipment supplier, while industry groups rejected claims that mining hardware could interfere with grid systems, citing the separation between mining operations and critical infrastructure controls and the use of demand-response programs that let facilities cut electricity usage during peak periods.