From the Document: "Two U.S. laws require the Department of Defense (DOD) and some agencies of the Department of Homeland Security (DHS) to purchase only domestic products for certain military and nonmilitary purposes. These laws are known as the Berry Amendment and the Kissell Amendment. Congress typically debates the Berry Amendment in the context of the annual National Defense Authorization Act. The laws are controversial. Supporters argue they help preserve the U.S. industrial base and create domestic manufacturing jobs. Some lawmakers also assert that production of government uniforms outside the United States raises national security concerns. Opponents believe the laws give monopolies to certain companies and raise the government's procurement costs. They also claim these laws are inconsistent with modern supply chains that source components and raw materials from multiple countries."
CRS In Focus, IF10605
Congressional Research Service: https://crsreports.congress.gov/