The primary domestic power of Congress is the ability to spend and regulate commerce, as outlined in the Constitution. This power allows Congress to significantly influence the economy and manage interstate trade. Other options listed do not accurately reflect the core domestic responsibilities of Congressional powers. ;
The primary domestic power of Congress is captured in option A: spending and regulating commerce, which is outlined in the Constitution. This authority allows Congress to significantly influence the economy and manage interstate commerce. Other options do not accurately reflect Congress's core domestic responsibilities.
;