The Buy American Act (BAA - 41 U.S.C. § 10a–10d) passed in 1933 by Congress and signed by President Roosevelt, required the United States government to prefer U.S.-made products in its purchases.
Other pieces of Federal legislation extend similar requirements to third-party purchases that utilize Federal funds, such as highway and transit programs.
In certain government procurements, the requirement purchase may be waived if the domestic product is more expensive than an identical foreign-sourced product by a certain percentage, if the product is not available domestically in sufficient quantity or quality, or if doing so is in the public interest.