Republican Senators Bill Cassidy (Louisiana) and Cynthia Lummis (Wyoming) introduced the "Mined in America Act" on Monday, aiming to reshore Bitcoin mining hardware manufacturing and anchor the establishment of a Strategic Bitcoin Reserve in law.
Voluntary certification with a hard edge
The bill creates a voluntary certification framework for crypto mining facilities and pools. Certified operators must gradually phase out equipment linked to "foreign adversaries" and move toward U.S.-manufactured hardware. China—home to Bitmain and MicroBT, which dominate global miner production—is clearly the target.
The National Institute of Standards and Technology (NIST) and the Manufacturing Extension Partnership (MEP) are directed to help domestic firms develop more secure and energy-efficient mining equipment. The legislation also seeks to codify ongoing executive efforts to establish a Strategic Bitcoin Reserve.
“Digital asset mining is a big part of our economy. We should be doing it here in America,” Cassidy said in a statement.
Hashrate leader, hardware laggard
The U.S. now accounts for roughly 38% of Bitcoin's global hashrate—the largest share of any country. Yet its miners remain heavily dependent on Chinese supply chains. In March, U.S. Customs suspended shipments of mining equipment over radio frequency concerns, causing delays. More recently, Senator Elizabeth Warren pressed the Commerce Department on national security risks tied to Bitmain hardware.
Trade friction and security scrutiny are pushing mining localization from market talk into legislative action. Bitmain itself announced plans to open its first U.S. mining chip factory by 2026. Still, even if the Mined in America Act passes, a full hardware transition could take 3-5 years.