21st Century Buy American Act

[AI summary unavailable — showing source text] 21st Century Buy American Act - Deems articles, materials, or supplies as made substantially all from articles, materials, or supplies mined, produced, or manufactured in the United States if the cost of the domestic components of such articles, materials, or supplies exceeds 60% of the total cost of all components of such articles, materials, or supplies. Prohibits the use of the overseas exception to Buy American requirements unless one of the following criteria is met: (1) the articles, materials, or supplies are needed on an urgent basis; (2) the articles, materials, or supplies are to be  purchased using a local supplier; or (3) a cost analysis demonstrates that the articles, materials, or supplies to be acquired would be more than 50% more expensive if made in the United States. Requires the head of a federal agency, in determining whether to apply the public interest exception to Buy American requirements, to: (1) consider the short-term and long-term effects of applying such exception on employment in the United States, and (2) determine that preserving or increasing employment in the United States is consistent with the public interest. Requires each federal agency th…