Restricting First Use of Nuclear Weapons Act of 2025

HR 669, the "Restricting First Use of Nuclear Weapons Act of 2025," requires Congress to declare war before the U.S. can conduct a first-use nuclear strike. It directly affects the President (who currently has sole authority to authorize such strikes), military commanders, and Congress by mandating that federal funds cannot be used for a first-use attack without a congressional declaration of war. The bill defines a "first-use nuclear strike" as an attack launched without prior confirmation that the U.S., its territories, or allies were first hit with nuclear weapons. This law changes policy by creating a constitutional check on presidential nuclear authority, requiring explicit congressional approval for the initial use of nuclear weapons.