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The Judicial Branch

The Supreme Court
of the United States

Nine people. Lifetime jobs. The final word on what the Constitution means, and the most powerful court in the world.

📖 15 min readArticle III of the Constitution9 Justices, 116 in US History

What Is the Supreme Court?

The Supreme Court is the highest court in the United States , the final stop for any legal dispute in the country. When the Supreme Court rules, that's it. No appeal. No do-overs. Whatever the Court decides is the law of the land until either the Court reverses itself or the Constitution is amended.

Nine justices, one Chief Justice and eight Associate Justices , decide the most important legal questions facing the country. They serve for life. They are nominated by the president and confirmed by the Senate. And their rulings shape American society in ways that last for generations.

The Court's Core Job

The Supreme Court interprets the Constitution. When Congress passes a law, or the president takes an action, or a state government does something, and someone believes it violates the Constitution, the courts decide. The Supreme Court has the final say. This power, called judicial review, is the foundation of the entire American legal system.

What the Constitution Says

The US Constitution

Article III, the slim constitutional basis for the federal judiciary (Public Domain)

Article III of the Constitution establishes the judicial branch, but it's surprisingly short and vague. It creates "one supreme Court" and whatever lower courts Congress decides to establish. It gives the Court jurisdiction over certain types of cases. And it says judges serve during "good behavior", which in practice means for life.

The Constitution says nothing about how many justices there should be. Nine is not a constitutional requirement, it's a number that has simply been the law since 1869. Congress sets the number of justices by statute, meaning Congress could theoretically change it.

The Court's most important power, judicial review, isn't even explicitly in the Constitution. The Court claimed it for itself in 1803 in Marbury v. Madison, and it has never been seriously challenged since.

Article III, The Constitutional Basis for the Supreme Court

Article III, Section 1

"The judicial Power of the United States, shall be vested in one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish. The Judges, both of the supreme and inferior Courts, shall hold their Offices during good Behaviour..."

Article III, Section 2

"The judicial Power shall extend to all Cases, in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made... to Controversies to which the United States shall be a Party..."

In plain English: There is one Supreme Court. Congress can create lower courts. Judges serve for life (unless impeached). The Court handles cases involving the Constitution, federal law, and disputes between states or involving the US government.

Why Are There 9 Justices?

Nine is not in the Constitution. The Court started with six justices in 1789, went as low as five, climbed as high as ten, and settled at nine in 1869, where it has remained ever since. The number was driven by practical considerations: the early justices had to "ride circuit" and physically travel to hear cases across the country, so the number of justices was often tied to the number of federal judicial circuits.

FDR's "Court Packing" Attempt, 1937

After the Supreme Court struck down several of his New Deal programs, President Franklin Roosevelt proposed adding up to six additional justices, one for every sitting justice over age 70, to give himself a favorable majority. Congress rejected the plan overwhelmingly, calling it an attack on judicial independence. The proposal failed, but the Court began upholding New Deal legislation shortly after anyway , what historians call "the switch in time that saved nine." The incident remains the most dramatic modern attempt to change the Court's size and the benchmark by which "court packing" proposals are still measured today.

Today, any proposal to expand the number of justices, from either party, is almost immediately labeled "court packing" and faces significant political resistance. Nine has become the de facto constitutional number, even though nothing in the Constitution requires it.

Lifetime Tenure: Why Justices Serve Until They Die or Retire

Federal judges, including Supreme Court justices, serve during "good behavior," which has always meant for life. They can only be removed through impeachment by the House and conviction by the Senate. It has never successfully happened to a Supreme Court justice (though Associate Justice Samuel Chase was impeached in 1804 and acquitted).

The Case For Lifetime Tenure

  • +Insulates justices from political pressure, they don't need to worry about re-election or reappointment
  • +Allows them to make unpopular but constitutionally correct decisions without fear of removal
  • +Attracts highly qualified candidates willing to give up lucrative legal careers
  • +Creates stability and continuity in the law across decades

The Case Against Lifetime Tenure

  • ,Justices can serve into mental or physical decline with no mechanism for removal
  • ,One president's appointments can shape the Court for 30+ years after they leave office
  • ,Creates intense battles over each nomination because the stakes are so permanent
  • ,Turns retirement decisions into political strategy, justices time exits to favor their party

The stakes are enormous: The average Supreme Court justice now serves about 25-28 years. A president who appoints two justices in their first term could shape the Court for a quarter century after leaving office. This is why modern confirmation battles are so intense, each seat is a multi-decade investment in legal philosophy.

How Justices Are Appointed

A Supreme Court vacancy is one of the most consequential events in American politics. The process is straightforward on paper , but can be explosive in practice:

1

A Vacancy Opens

A justice dies, retires, or is impeached and removed. The timing of vacancies is often unpredictable, and politically explosive. Justices sometimes time their retirements to give the president they prefer the nomination.

2

President Nominates

The president selects a nominee, typically from the federal appellate courts, though there's no requirement for judicial experience. Presidents consult with advisers, senators, and advocacy groups before announcing. Background checks are extensive.

3

Senate Judiciary Committee Hearings

The nominee appears before the Senate Judiciary Committee for days of televised questioning. Senators ask about legal philosophy, past rulings, and hypothetical cases. Nominees typically answer in generalities to avoid pre-committing on future cases, a practice called the 'Ginsburg rule.'

4

Committee Vote

The committee votes on whether to recommend the nominee to the full Senate. A negative vote doesn't automatically kill the nomination, the full Senate can still vote.

5

Full Senate Vote

A simple majority (51 votes) is needed to confirm since Republicans eliminated the judicial filibuster in 2017. Before that, 60 votes were needed to overcome a filibuster. Confirmation votes are almost always along party lines in the modern era.

6

Sworn In

The confirmed justice takes two oaths: the Constitutional Oath and the Judicial Oath. They immediately take their seat and begin participating in the Court's work.

How the Court Actually Works

The Supreme Court courtroom interior

The Supreme Court courtroom, the most powerful courtroom in the world (Public Domain)

The Supreme Court operates on a structured annual cycle and uses very specific procedures to decide which cases to hear and how to rule on them:

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The Term

The Supreme Court's term runs from the first Monday in October to late June or early July. During the term, justices hear oral arguments, hold private conferences, write opinions, and issue rulings. The summer recess is spent writing opinions and reviewing cert petitions for the next term.

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How Cases Get to the Court, Certiorari

Almost all Supreme Court cases arrive through a 'petition for a writ of certiorari', a formal request asking the Court to review a lower court's decision. The Court receives roughly 7,000-8,000 petitions per year and accepts only about 60-80 cases. The justices vote privately on which cases to hear, 'the Rule of Four' means at least four justices must vote to grant cert.

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Oral Arguments

Accepted cases get oral arguments, typically 30 minutes per side, though important cases sometimes get more. Attorneys make their case while justices pepper them with questions. The courtroom is open to the public on a first-come basis. There are no cameras allowed, no video has ever been broadcast from the Supreme Court chamber.

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The Conference

After oral arguments, the nine justices meet in complete privacy, no clerks, no staff, to discuss and vote on the case. The Chief Justice speaks first, then justices in order of seniority. A majority vote decides the outcome. The most senior justice in the majority assigns who writes the opinion.

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Writing Opinions

The assigned justice drafts the majority opinion, which becomes the law. Other justices can join the majority, write concurring opinions (agreeing with the result but for different reasons), or write dissenting opinions (disagreeing with the result). Opinions are circulated among justices who may revise their positions before the final decision is announced.

Types of Opinions

When the Court issues a decision, you often see references to majority opinions, concurrences, and dissents. Here's what each one means and why they matter:

Majority Opinion

This IS the law

Written by one justice on behalf of at least five (a majority of nine). This is the binding legal ruling, it creates precedent that all lower courts must follow. Everything else is commentary.

Concurring Opinion

Agrees but for different reasons

A justice who agrees with the outcome but for different legal reasons writes a concurrence. Concurrences don't create binding precedent but can influence how future courts interpret the majority.

Dissenting Opinion

Disagrees with the ruling

A justice who disagrees writes a dissent. Dissents have no legal force, but they matter. They can be powerful arguments that future Courts use to overturn the majority. Justice Harlan's Plessy dissent was vindicated 58 years later in Brown.

Plurality Opinion

Majority on outcome, not reasoning

When a majority agrees on the outcome but can't agree on the reasoning, the opinion with the most justices is the plurality. It's binding on the specific case but creates weaker precedent than a true majority opinion.

Per Curiam

By the Court as a whole

An unsigned opinion issued in the name of the Court collectively, not attributed to any individual justice. Often used for brief, relatively uncontroversial rulings or emergency orders.

Unanimous Decision

All 9 agree

When all nine justices agree on both the outcome and reasoning. Rare on major cases. Carries enormous moral and legal weight, Brown v. Board and United States v. Nixon were both unanimous, which gave them undeniable legitimacy.

The Current Court, 2025

Portrait of Justice John G. Roberts Jr.

Chief Justice

John G. Roberts Jr.

Appointed by: George W. Bush

Year confirmed: 2005

Born: 1955 , MD

Conservative

17th Chief Justice. Strong record on limiting campaign finance regulation and voting rights laws. Critics say he has used procedural minimalism to achieve conservative outcomes while maintaining an appearance of neutrality. Supporters credit him with protecting the Court's institutional reputation.

Portrait of Justice Clarence Thomas

Clarence Thomas

Appointed by: George H.W. Bush

Year confirmed: 1991

Born: 1948 , GA

Conservative

Longest-serving current justice. Strict originalist who often argues for overturning broad precedents. Has faced scrutiny over undisclosed gifts and travel from wealthy donors. Supporters argue he is the most intellectually consistent justice on the Court.

Portrait of Justice Samuel A. Alito Jr.

Samuel A. Alito Jr.

Appointed by: George W. Bush

Year confirmed: 2006

Born: 1950 , NJ

Conservative

Authored the Dobbs majority opinion overturning Roe v. Wade. Has faced criticism over public comments seen as politically partisan for a sitting justice. Supporters view him as one of the Court's most rigorous legal thinkers.

Portrait of Justice Sonia Sotomayor

Sonia Sotomayor

Appointed by: Barack Obama

Year confirmed: 2009

Born: 1954 , NY

Liberal

First Hispanic Justice. Critics have questioned whether her stated belief that a 'wise Latina' judge would reach better conclusions than a white male reflects impartiality. Supporters point to her extensive federal court experience and frequent, pointed dissents as a strong liberal voice.

Portrait of Justice Elena Kagan

Elena Kagan

Appointed by: Barack Obama

Year confirmed: 2010

Born: 1960 , MA

Liberal

Former Dean of Harvard Law School. Critics note she had no prior judicial experience before joining the Court, which is unusual. She has also faced questions over her participation in cases related to the Affordable Care Act. Supporters praise her clear writing and ability to find common ground.

Portrait of Justice Neil M. Gorsuch

Neil M. Gorsuch

Appointed by: Donald Trump

Year confirmed: 2017

Born: 1967 , CO

Conservative

Filled the seat held open for nearly a year after Republicans blocked Merrick Garland's hearing. Textualist who has occasionally sided with liberals on Native American rights and LGBTQ+ employment cases. Critics argue his seat was obtained through an unprecedented obstruction of the confirmation process.

Portrait of Justice Brett M. Kavanaugh

Brett M. Kavanaugh

Appointed by: Donald Trump

Year confirmed: 2018

Born: 1965 , MD

Conservative

Confirmed after allegations of sexual misconduct led to one of the most divisive hearings in Senate history. He denied the allegations. Critics questioned the limited scope of the FBI investigation. Supporters argue his judicial record reflects careful, moderate conservatism.

Portrait of Justice Amy Coney Barrett

Amy Coney Barrett

Appointed by: Donald Trump

Year confirmed: 2020

Born: 1972 , IN

Conservative

Confirmed 8 days before the 2020 election, drawing criticism from Democrats who argued the seat should wait, the same standard Republicans used to block Merrick Garland in 2016. Supporters note her strong academic credentials and methodical originalist approach.

Portrait of Justice Ketanji Brown Jackson

Ketanji Brown Jackson

Appointed by: Joe Biden

Year confirmed: 2022

Born: 1970 , DC

Liberal

First Black woman Justice. Critics questioned her sentencing record in child exploitation cases during confirmation hearings. Supporters called those criticisms misleading and noted her extensive experience as a public defender, federal trial judge, and appellate judge.

Landmark Cases That Changed America

Click any case to read the full story and impact.

Chief Justice of the United States

Chief Justice John Roberts

John G. Roberts Jr.

17th Chief Justice of the United States

Appointed ByGeorge W. Bush
Year2005
BornJanuary 27, 1955
Home StateMaryland
Law SchoolHarvard Law School

Known for his institutionalist approach and concern for the Court's legitimacy. Has often served as a swing vote, occasionally siding with liberal justices to protect precedent or avoid sweeping rulings.

Quick Facts

Total Justices9
Chief JusticeJohn Roberts
Associate Justices8
Total in US History116
TenureLifetime (good behavior)
Votes to Confirm51 (simple majority)
Cases Heard/Year~60-80
Petitions Received~7,000-8,000/year
Rule of Four4 justices must agree to hear a case
Court TermOct, June/July
Building Completed1935
Location1 First Street NE, Washington DC
First Chief JusticeJohn Jay (1789)
Cameras AllowedNo, never

Where to Find It

Article III, §1Creates the Supreme Court and all federal courts
Article III, §2Defines the Court's jurisdiction
Article III, §3Treason, the only crime defined in the Constitution
Article II, §2President nominates justices, Senate confirms
Marbury v. Madison (1803)Established judicial review, the Court's most important power

Did You Know?

No cameras, ever

The Supreme Court has never allowed cameras in the courtroom for oral arguments or decision announcements. You can listen to audio recordings released after arguments, but no video has ever been broadcast from inside the chamber. The Court has resisted cameras for decades despite congressional pressure.

Justices sit by seniority

At the bench, the Chief Justice sits in the center. The most senior Associate Justice sits to the Chief's immediate right, the second most senior to the left, alternating outward. The most recently confirmed justice sits at the far ends.

The building itself was an afterthought

For most of American history, the Supreme Court had no building of its own. It met in the Capitol, in taverns, and in private homes. The current Supreme Court building was only completed in 1935, 146 years after the Court was founded. Justice Harlan Fiske Stone reportedly said the new building was 'almost bombastically pretentious.'

Ruth Bader Ginsburg and Antonin Scalia were best friends

Despite being on completely opposite ends of the ideological spectrum, Ginsburg the liberal icon, Scalia the conservative giant, the two were close personal friends who traveled together, attended opera together, and celebrated New Year's Eve together. Their friendship became famous as proof that ideological opponents can maintain genuine human connections.