Judicial Review Explained

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Judicial review did not appear in the Constitution as a neat label, yet the logic of the written Constitution made the principle hard to escape. If the Constitution is supreme law, then judges deciding actual cases must prefer it to ordinary statutes that contradict it. That reasoning became explicit in the early republic and permanently changed how Americans understood constitutional government.

The idea before Marbury

The framers had inherited a legal tradition in which courts interpreted written charters and could refuse to apply rules contrary to higher law. Alexander Hamilton stated in Federalist No. 78 that courts were bound to regard the Constitution as fundamental law and to enforce it over inconsistent acts of the legislature. Even before 1803, state and federal judges had already hinted at the same principle in their reasoning.

What makes judicial review constitutional

Article III gives the judicial power to the federal courts in cases arising under the Constitution, laws, and treaties of the United States. The Supremacy Clause in Article VI also declares the Constitution the supreme law of the land. Once those provisions are read together, judges cannot honestly decide constitutional cases by pretending a plainly unconstitutional statute has equal authority.

Marbury and the early republic

The dispute in Marbury v. Madison grew out of the bitter transition from John Adams to Thomas Jefferson in 1801. Chief Justice John Marshall held in 1803 that William Marbury had a right to his commission, but that the Court lacked jurisdiction because part of the Judiciary Act of 1789 conflicted with the Constitution. By striking that portion of the statute aside, Marshall stated the classic rule that it is emphatically the duty of the judiciary to say what the law is.

The promise and the danger

Judicial review can preserve liberty when legislatures or presidents exceed constitutional limits. It can also become controversial when courts appear to substitute policy preferences for faithful interpretation of the text and structure ratified by the people. For that reason judicial review only remains legitimate when it is tied to the Constitution's original legal authority rather than to judicial improvisation.

Why judicial review still matters

Americans still rely on courts to police constitutional boundaries in disputes over speech, religion, federal power, executive action, and criminal procedure. The principle does not make judges sovereign over the republic, but it does make the Constitution higher than temporary majorities. Judicial review therefore matters because a written constitution would mean very little if no institution could refuse to treat an unconstitutional act as law.