Final answer:
The U.S. Supreme Court has exerted its policy-making power through the principle of judicial review, established in Marbury v. Madison. It has consistently expanded the regulatory power of Congress over commerce and shares its influence over policy-making with lower federal and state courts.
Step-by-step explanation:
The US Supreme Court has proven its power to make policy through the principle of judicial review. This was established in the landmark case Marbury v. Madison in 1803. The court holds the ability to interpret legislation and declare its constitutionality, often influencing policy direction.
Additionally, the court has consistently expanded the Congress's power to regulate interstate and intrastate commerce, further shaping policy as seen in decisions that allowed for federal environmental regulations and programs.
The power to influence policy is not confined to the Supreme Court but is shared with lower federal courts and even state courts. Therefore, through judicial review, influence over commerce, and its shared judicial powers, the Court has proven its vital role in policy-making.
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