2.8 The Judicial Branch

TLDR

Judicial review is the power of courts to strike down laws or executive actions that violate the Constitution, and it makes the judiciary a real check on the other branches. For AP Gov, you need to connect this power to two foundational sources: Article III of the Constitution and Federalist No. 78. Marbury v. Madison is the required case that first established judicial review.

AP Gov Judicial Branch Review

For AP Gov, the judicial branch interprets the Constitution, federal laws, and treaties through the federal court system. Article III creates the Supreme Court and allows Congress to create lower federal courts, while Federalist No. 78 explains why judges need independence from political pressure.

The most important power to know is judicial review: courts can declare laws or executive actions unconstitutional. Article III does not say this power directly, so connect judicial review to Marbury v. Madison, the required Supreme Court case that established it.

Why This Matters for the AP Gov Exam

This topic is the foundation for everything you study about the courts in AP Gov. Once you understand judicial review, the later topics on precedent, life tenure, and checks on the courts make much more sense.

Judicial review shows up across the exam:

• On the multiple-choice section, you may be asked to identify the source of judicial review or explain how it fits into checks and balances.
• On the SCOTUS Comparison FRQ (FRQ 3), Marbury v. Madison is a required case, and you may need to compare it to a non-required case based on a shared principle like judicial review or separation of powers.
• On the Argument Essay (FRQ 4), Federalist No. 78 is a required foundational document you can use as evidence about judicial independence and the courts' role in limiting government.

Key Takeaways

• Judicial review is the power of courts to declare laws or executive actions unconstitutional. It is not written directly into Article III.
• Article III establishes the federal judiciary, creates the Supreme Court, lets Congress create lower courts, and protects judges with tenure during good behavior and protected salaries.
• Federalist No. 78, written by Alexander Hamilton, argues the judiciary is the "least dangerous" branch and defends judicial independence and judicial review.
• Marbury v. Madison (1803) is the required case that first established judicial review.
• Judicial independence, supported by life tenure, lets judges decide cases on legal reasoning instead of political pressure.

Constitutional Foundations: Article III and Federalist No. 78

Two sources give the judicial branch its authority and explain why it stays independent: Article III of the Constitution and Federalist No. 78. Both are tied directly to this topic.

Article III: The Judiciary in the Constitution

Article III sets up the federal courts as a co-equal branch. Its main features:

• It creates the Supreme Court and lets Congress create lower (inferior) courts.
• It gives federal courts jurisdiction over cases that arise under the Constitution, federal laws, and treaties.
• It protects judicial independence by giving judges tenure "during good behavior" and barring Congress from cutting their salaries while in office.

Article III does not spell out judicial review. That power developed through interpretation, which is why Marbury v. Madison matters so much.

Federalist No. 78: The Case for Judicial Independence

Alexander Hamilton wrote Federalist No. 78 to defend the judiciary. He calls it the "least dangerous" branch because it controls neither the military (the sword) nor the budget (the purse). Still, he argues the courts need independence and the power to review laws.

Main ideas to remember:

• Judges must measure laws against the Constitution and refuse to enforce ones that conflict with it.
• Tenure during good behavior shields judges from political pressure so they can be impartial.
• An independent judiciary protects the Constitution and individual liberty.

Use Federalist No. 78 when an FRQ or essay asks about judicial independence, checks and balances, or the courts' authority to limit other branches.

Judicial Review: What It Does

Judicial review is the power of courts to decide whether a law or executive action follows the Constitution. If it does not, the court can declare it unconstitutional, which means it cannot be enforced.

This power makes the judiciary part of checks and balances:

Even though judicial review is not stated in Article III, it lets the courts restrain the other branches when they go past constitutional limits.

Marbury v. Madison (1803): The Required Case

In Marbury v. Madison, Chief Justice John Marshall ruled that part of the Judiciary Act of 1789 conflicted with the Constitution. By doing so, the Court claimed the power to declare an act of Congress unconstitutional.

Why it matters:

• It established judicial review as a core function of the Supreme Court.
• It confirmed that the Constitution is the supreme law of the land.
• It positioned the Court as the final interpreter of what the Constitution means.

Marbury v. Madison is a required AP Gov case, so know it well enough to use it as evidence and as the case in a SCOTUS Comparison FRQ.

Judicial Independence and Tenure

Federal judges are nominated by the president and confirmed by the Senate, then serve during good behavior. This protection:

• Shields judges from political retaliation and shifting public opinion.
• Encourages rulings based on legal reasoning rather than partisanship.
• Helps protect the rule of law and minority rights.

This independence is exactly what Hamilton defends in Federalist No. 78. It connects forward to later topics about life tenure and the debates over the Court's power.

How to Use This on the AP Gov Exam

These are the most likely ways this topic appears, not every possible question.

MCQ

Expect questions that ask you to identify where judicial review comes from, explain how it fits into checks and balances, or match Federalist No. 78 to the idea of judicial independence. Watch for answer choices that wrongly say Article III directly grants judicial review.

FRQ 3: SCOTUS Comparison

Marbury v. Madison is a required case. You may need to compare it with a non-required case that shares a principle such as judicial review or separation of powers. Focus on the constitutional reasoning, not just the facts.

FRQ 4: Argument Essay

Federalist No. 78 is a required foundational document. Use it as evidence when an argument prompt deals with judicial independence, checks and balances, or the courts' role in limiting government. Tie a specific idea from the document to your claim.

Common Trap

Do not say the Constitution "gives" the Court judicial review in plain text. Article III set up the courts, but judicial review came from the Court's own interpretation in Marbury v. Madison.

Common Misconceptions

• Judicial review is not written word-for-word in the Constitution. It was established through interpretation in Marbury v. Madison.
• "Least dangerous branch" does not mean weak. Hamilton's point in Federalist No. 78 is that the judiciary lacks the sword and purse, but it still plays a powerful constitutional role.
• Judicial review and judicial independence are not the same thing. Review is the power to strike down unconstitutional acts. Independence comes from protections like tenure during good behavior and protected salaries.
• Life tenure does not mean judges can never be removed. Federal judges can be impeached and removed for misconduct.
• The Supreme Court is not the only court that matters, but for this topic, focus on how Article III and Federalist No. 78 ground the judiciary's power and independence.

Related AP Gov Guides

• 2.1 Congress: The Senate and the House of Representatives
• 2.2 Structures, Powers, and Functions of Congress
• Unit 2 Overview: Interactions Among Branches of Government
• 2.4 Roles and Power of the President
• 2.12 The Bureaucracy
• 2.5 Checks on the Presidency