The United States frequently employs secondary sanctions as a foreign policy tool, but their effectiveness remains a subject of debate. These sanctions target entities that conduct business with a sanctioned country, like Russia, aiming to deter specific behaviors. Proponents argue that secondary sanctions can be a powerful deterrent against aggression and economic malfeasance. Critics, however, question their enforceability and potential for unintended economic consequences. The debate surrounding their efficacy continues as the US weighs their use in addressing international conflicts.