The judicial branch has no army and no budget of its own. Alexander Hamilton called it the “least dangerous” branch. Yet its decisions can reshape the entire government.
What Article III Says
Article III vests the judicial power in “one supreme Court” and in lower courts that Congress chooses to create. Federal judges serve “during good Behaviour,” effectively for life, and their pay cannot be reduced while in office. These protections are designed to let judges rule without fear of political retaliation.
The Constitution does not set the number of Supreme Court justices. Congress does by statute, and the number has been nine since 1869.
How the Federal Courts Are Organized
- District courts: 94 trial courts where most federal cases begin
- Courts of appeals: 13 circuit courts that review district court decisions
- The Supreme Court: hears a small fraction of the thousands of petitions it receives each year, typically fewer than 100 cases
Most cases reach the Supreme Court through a petition for a writ of certiorari. Four of the nine justices must agree to hear a case.
Judicial Review: Marbury v. Madison
Nowhere does the Constitution expressly say courts may strike down laws. That power was established in Marbury v. Madison (1803). Chief Justice John Marshall wrote that “it is emphatically the province and duty of the judicial department to say what the law is,” and that a law conflicting with the Constitution is void.
Judicial review applies to acts of Congress, actions of the President and federal agencies, and state laws that conflict with the Constitution or valid federal law.
Limits on the Courts
- Courts decide only actual “cases” or “controversies.” They do not issue advisory opinions
- A party must have standing: a concrete injury caused by the challenged action that a court can remedy
- Congress controls the size and much of the jurisdiction of the federal courts
- Judges are nominated by the President and confirmed by the Senate, and can be impeached and removed
- The Constitution itself can be amended to overturn a Supreme Court interpretation
Why It Matters Now
Some of the most consequential questions in American government, including how far emergency powers reach and where federal authority ends and state authority begins, are being decided in federal court. Understanding how the courts work is the first step to understanding those decisions.
Keep Digging With Truth Agent
This article is a starting point. Truth Agent puts the public record at your fingertips, including the Constitution, federal law, regulations, court opinions and oversight reports, so you can read Supreme Court opinions in full and follow the cases that shape federal power without relying on anyone’s summary, including ours.
Read Next on Truth Trench
- The Bill of Rights, Amendment by Amendment
- How Federal Regulations Are Made, and How You Can Comment on One
