Which action demonstrates the power of Congress to declare war?

The action that demonstrates the power of Congress to declare war is passing a declaration of war through both houses. This process is essential because the framers of the Constitution vested the power to declare war in Congress as a way to ensure that a representative body, rather than a single individual, would make such significant decisions affecting the nation.

When Congress passes a declaration of war, it requires not only a majority vote in one house but also must be approved by the other, reflecting a thorough legislative process that involves debate and consideration of the implications of warfare. This is in contrast to actions such as a president signing a military agreement or endorsing a military operation, which do not specifically constitute a formal declaration of war. Judicial review pertains to the courts' power to review actions taken by the executive or legislative branches but does not involve Congress's authority to declare war directly. Thus, passing a declaration of war represents Congress fulfilling its constitutional responsibility regarding military engagement.