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These ten cases aren't just historical footnotes. They're the foundation of how American government actually works. You're being tested on your ability to understand how the Supreme Court has shaped the balance of power between federal and state governments, individual rights and government authority, and the ongoing struggle for civil rights and equality. Each case represents a moment when the Court either expanded or restricted constitutional protections, and understanding the reasoning behind these decisions is essential for analyzing modern political debates.
Don't just memorize case names and dates. Know what constitutional principle each case established, how later cases built upon or overturned earlier precedents, and why these decisions remain politically relevant today. The strongest exam responses connect specific rulings to broader themes of judicial power, federalism, due process, and equal protection, concepts that appear repeatedly in FRQs and multiple-choice questions.
The Court's power to interpret the Constitution and check the other branches wasn't explicitly written into the document. It was claimed through strategic rulings that defined the judiciary's role in American government.
Judicial review, the power of courts to strike down laws that violate the Constitution, was established here. This is the foundation of all Supreme Court authority.
Chief Justice John Marshall strategically avoided a direct confrontation with President Jefferson while permanently expanding judicial power. He ruled that Marbury deserved his commission but that the Court lacked jurisdiction to order its delivery, because Section 13 of the Judiciary Act of 1789 unconstitutionally expanded the Court's original jurisdiction beyond what Article III defined. By giving up a small power, Marshall claimed a far greater one.
Constitutional interpretation became the Court's primary function, setting precedent for every landmark case that followed.
Executive privilege exists but is not absolute. The Court ruled unanimously (8-0, with Justice Rehnquist recused) that the president must comply with judicial subpoenas in criminal proceedings.
The defining principle here is that no person is above the law. Nixon was forced to release the Watergate tapes, which revealed his involvement in the cover-up and led directly to his resignation.
Separation of powers was reinforced: the judiciary can check presidential authority even when the president claims confidentiality is necessary for the functioning of the executive branch.
Compare: Marbury v. Madison vs. United States v. Nixon: both cases established limits on governmental power through judicial authority. Marbury claimed the power of judicial review; Nixon applied it directly to the executive branch. If an FRQ asks about checks and balances, these two cases demonstrate the Court checking both Congress and the President.
The balance between federal and state authority has been contested since the Constitution's ratification. This case defined when national law trumps state action.
Implied powers under the Necessary and Proper Clause (Article I, Section 8) allow Congress to take actions not explicitly listed in the Constitution, like creating a national bank. The bank wasn't mentioned in the Constitution, but Marshall ruled it was a legitimate means of carrying out Congress's enumerated powers over taxation, borrowing, and currency.
Federal supremacy prevents states from taxing or interfering with legitimate federal institutions. Marshall's famous line: "the power to tax involves the power to destroy." Under the Supremacy Clause (Article VI), Maryland's tax on the bank was unconstitutional.
Broad constitutional interpretation was established here as well. The Constitution should be read flexibly to meet national needs, not strictly limited to enumerated powers. This reasoning has been used ever since to justify expanding federal authority into new areas.
Compare: McCulloch v. Maryland vs. Marbury v. Madison: both were Marshall Court decisions that expanded federal power, but through different mechanisms. Marbury empowered the judiciary; McCulloch empowered Congress. Together, they established the framework for a strong national government.
The Court's record on racial equality reveals both its potential to advance justice and its capacity to entrench discrimination. These cases must be understood as a conversation across time, with later rulings directly responding to earlier failures.
Denied citizenship to all African Americans, free or enslaved. Chief Justice Taney wrote that Black people "had no rights which the white man was bound to respect."
The Missouri Compromise was struck down as unconstitutional, with the Court ruling that Congress could not prohibit slavery in the territories. This inflamed sectional conflict and pushed the country closer to the Civil War.
This case exposed the limits of judicial authority when the Court reflects rather than challenges prevailing prejudices. It took the Thirteenth Amendment (abolishing slavery) and the Fourteenth Amendment (granting citizenship and equal protection) to overturn this decision, not another court case.
The "separate but equal" doctrine legitimized Jim Crow segregation laws. The case arose from a Louisiana law requiring separate railroad cars for Black and white passengers, and the Court ruled that racial separation didn't violate the Fourteenth Amendment's Equal Protection Clause.
The Equal Protection Clause was narrowly interpreted to allow states to mandate racial segregation in public facilities, so long as the separate facilities were supposedly "equal." In practice, they almost never were. Black facilities were consistently underfunded and inferior.
Justice Harlan's dissent famously declared "our Constitution is color-blind," language that would later support overturning this precedent nearly sixty years later.
Overturned Plessy, unanimously ruling that "separate educational facilities are inherently unequal." The Court drew on social science research, including psychologist Kenneth Clark's doll studies, showing that segregation inflicted psychological harm on Black children.
The Equal Protection Clause was reinterpreted to prohibit state-mandated segregation in public schools, directly rejecting the "separate but equal" framework.
Chief Justice Earl Warren worked to secure a unanimous decision, understanding that a split ruling would give segregationists room to resist. Unanimity sent a stronger moral and legal signal during a volatile period in American race relations.
Compare: Plessy v. Ferguson vs. Brown v. Board of Education: these cases represent the Court reversing itself on the same constitutional question. Plessy allowed "separate but equal"; Brown rejected it. This pairing is essential for FRQs about how constitutional interpretation evolves over time and how precedent can be overturned.
The Warren Court dramatically expanded protections for criminal defendants, ruling that the Bill of Rights applies to state proceedings through the Fourteenth Amendment's Due Process Clause. This process is called incorporation, where protections originally limiting only the federal government are applied to the states one by one.
The right to counsel guaranteed by the Sixth Amendment applies to state courts, not just federal proceedings. Clarence Earl Gideon was charged with a felony in Florida and denied a lawyer because state law only provided attorneys in capital cases. He petitioned the Supreme Court by hand from prison.
The Court ruled that indigent defendants (those who can't afford a lawyer) must be provided attorneys at state expense. Without legal representation, a fair trial is essentially impossible.
This case expanded the incorporation doctrine by applying another Bill of Rights protection to the states through the Fourteenth Amendment.
Miranda warnings are now required before custodial interrogation: you have the right to remain silent, the right to an attorney, and anything you say can be used against you in court.
The Fifth Amendment protection against self-incrimination was extended to police questioning, not just courtroom testimony. The Court reasoned that the inherently coercive atmosphere of police custody required procedural safeguards to ensure that any statements made were truly voluntary.
These procedural safeguards were designed to prevent coerced confessions and protect suspects who may not know their constitutional rights.
Compare: Gideon v. Wainwright vs. Miranda v. Arizona: both expanded rights of the accused through incorporation, but Gideon addressed the Sixth Amendment (right to counsel) while Miranda addressed the Fifth Amendment (self-incrimination). Both reflect the Warren Court's emphasis on protecting individuals against government power in criminal proceedings.
The Court has recognized unenumerated rights, protections not explicitly listed in the Constitution, by interpreting the Due Process and Equal Protection Clauses of the Fourteenth Amendment.
A constitutional right to privacy was extended to a woman's decision to terminate a pregnancy, derived from the Due Process Clause of the Fourteenth Amendment.
The Court created a trimester framework that established varying levels of state interest as pregnancy progressed. This framework was later replaced by the "undue burden" standard in Planned Parenthood v. Casey (1992). Roe was ultimately overturned by Dobbs v. Jackson Women's Health Organization (2022), which held that the Constitution does not confer a right to abortion and returned the issue to state legislatures.
The legal theory at work was substantive due process, which holds that the Due Process Clause protects not just fair procedures but certain fundamental rights from government interference. This distinction between procedural and substantive due process is worth knowing for exam purposes.
Same-sex marriage was legalized nationwide. The Court ruled that state bans violated both due process and equal protection under the Fourteenth Amendment.
The fundamental right to marry was affirmed as a protected liberty that cannot be denied based on sexual orientation. Justice Kennedy's majority opinion emphasized that marriage is a keystone of social order and that same-sex couples sought equal dignity under the law.
The Fourteenth Amendment was interpreted to require states to both license and recognize same-sex marriages performed in other states.
Compare: Roe v. Wade vs. Obergefell v. Hodges: both relied on substantive due process to protect personal decisions from government interference, but Roe focused primarily on privacy while Obergefell emphasized both liberty and equality. Both cases sparked significant political backlash and ongoing legal challenges, illustrating how Court decisions on social issues often intensify rather than resolve political conflict. The overturning of Roe in 2022 also shows that even landmark precedents are not permanent.
| Concept | Best Examples |
|---|---|
| Judicial Review | Marbury v. Madison, United States v. Nixon |
| Federalism/National Supremacy | McCulloch v. Maryland |
| Equal Protection & Civil Rights | Dred Scott, Plessy v. Ferguson, Brown v. Board |
| Rights of the Accused | Gideon v. Wainwright, Miranda v. Arizona |
| Substantive Due Process/Privacy | Roe v. Wade, Obergefell v. Hodges |
| Overturning Precedent | Brown (overturning Plessy), Dobbs (overturning Roe) |
| Checks on Executive Power | United States v. Nixon |
| Incorporation Doctrine | Gideon, Miranda |
Which two cases best illustrate the Supreme Court's power to check the other branches of government, and what distinguishes how each case exercised that power?
How does Brown v. Board of Education demonstrate that constitutional interpretation can change over time? What specific precedent did it overturn, and on what grounds?
Compare Gideon v. Wainwright and Miranda v. Arizona: which amendment does each case interpret, and what common principle of criminal justice do they both advance?
If an FRQ asked you to explain how the Court has used the Fourteenth Amendment to expand individual rights, which three cases would provide the strongest examples and why?
Contrast the Court's reasoning in Dred Scott v. Sandford with its reasoning in Obergefell v. Hodges: how do these cases reveal different approaches to interpreting who is entitled to constitutional protection?