Restricting First Use of Nuclear Weapons Act of 2025

Prohibits use of federal funds to carry out a U.S. “first‑use” nuclear strike unless Congress has declared war and expressly authorized such a strike. It defines a first‑use nuclear strike as a nuclear attack launched without prior confirmation from the Secretary of Defense and the Chairman of the Joint Chiefs of Staff that the United States, its territories, or named allies have already been struck, and establishes a national policy against first use of nuclear weapons absent a Congressional declaration.