Federal judges have lifetime appointments and no constituents to answer to. They cannot be voted out of office. Their salaries cannot be reduced while they serve. This insulation from political pressure was deliberate — the founders wanted judges who could make unpopular decisions without fear of losing their jobs. Understanding how they get their positions and what they decide helps explain why federal courts are so consequential.
The Structure of the Federal Court System
The federal court system has three levels. At the bottom are 94 district courts — the trial courts where federal cases begin. Every state has at least one district court. California has four. New York has four. Wyoming has one. District courts hold trials, hear evidence, and issue rulings in the first instance.
Above district courts are 13 circuit courts of appeals — also called appellate courts. When a party loses in district court they can appeal to the circuit court that covers their region. The circuit courts do not hold new trials — they review whether the district court applied the law correctly. They issue written opinions that become binding precedent for all lower courts within their circuit.
At the top sits the Supreme Court, which reviews decisions from the circuit courts and state supreme courts on questions of federal and constitutional law. Its decisions bind every court in the country.
How Federal Judges Are Appointed
All federal judges — district court judges, circuit court judges, and Supreme Court justices — are nominated by the president and confirmed by the Senate. There is no requirement that federal judges be lawyers, though all of them are in practice. There is no age requirement and no term limit. Once confirmed they serve until they die, retire, or are removed through impeachment.
The confirmation process has become significantly more contentious over the past three decades. District court nominations were once largely noncontroversial. Circuit court and Supreme Court nominations now frequently involve extended Senate battles, filibusters, and party-line votes. The ideological composition of the federal courts — shaped by which party controls the White House and Senate — has long-term consequences that extend well beyond any single presidency.
What Federal Courts Decide
Federal courts have jurisdiction over cases involving the U.S. Constitution, federal laws, disputes between states, cases involving the federal government, and cases involving parties from different states above a certain dollar threshold. They do not handle most criminal cases — the vast majority of criminal prosecutions happen in state courts under state law.
The cases that reach the federal courts include challenges to federal regulations, civil rights claims, immigration cases, intellectual property disputes, antitrust cases, and constitutional challenges to government action at every level. A federal court ruling that a law violates the Constitution can invalidate that law immediately and nationwide.
Judicial Review — The Power Not in the Constitution
The most significant power of the federal courts — the power to strike down laws as unconstitutional — is not explicitly mentioned in the Constitution. It was established by the Supreme Court itself in the 1803 case Marbury v. Madison, in which Chief Justice John Marshall argued that the Constitution is the supreme law of the land and that courts must enforce it even against acts of Congress. That principle — judicial review — has defined the role of courts in American government ever since.
The federal court system is explained in detail at uscourts.gov. Every federal court opinion is available at court websites and at the free legal research site courtlistener.com.