AP United States Government and Politics

## Learning Outcomes

- Explain how the **Fourteenth Amendment** changed the balance of power between the states and the federal government
- Distinguish between the **Due Process Clause** and the **Equal Protection Clause**
- Understand how **selective incorporation** applied most of the Bill of Rights to the states
- Identify the importance of **Barron v. Baltimore (1833)**, **Gitlow v. New York (1925)**, **Brown v. Board of Education (1954)**, **McDonald v. Chicago (2010)**, and **Cooper v. Aaron (1958)**
- Explain why the Fourteenth Amendment is a federalism topic as well as a civil rights topic
- Apply these ideas in AP-style multiple-choice, SCOTUS comparison, and argument questions

## AP United States Government and Politics Syllabus

For the AP United States Government and Politics, you are expected to understand Fourteenth Amendment protections as part of constitutional interpretations of federalism, with a focus on the following syllabus points:

- Know that **Barron v. Baltimore (1833)** held that the Bill of Rights originally restricted only the national government
- Identify the major parts of **Fourteenth Amendment, Section 1**, including **due process**, **equal protection**, and **privileges or immunities**
- Explain how the **Due Process Clause** became the main basis for **selective incorporation**
- Understand that **Gitlow v. New York (1925)** began the major process of applying First Amendment protections to the states
- Explain how **Brown v. Board of Education (1954)** used the **Equal Protection Clause** to strike down school segregation
- Understand how **McDonald v. Chicago (2010)** applied the **Second Amendment** to the states through the Fourteenth Amendment
- Know that incorporation happened **case by case**, not all at once, and that **most but not all** Bill of Rights protections apply to the states
- Explain how **Cooper v. Aaron (1958)** reinforced federal supremacy by requiring states to follow Supreme Court constitutional rulings

## Test Your Knowledge

_Attempt these questions before reading this article. If you find some difficult or cannot remember the answers, look more closely at that area during your revision._

1. Before the Fourteenth Amendment was used for incorporation, what did **Barron v. Baltimore** say about the Bill of Rights?
2. What is the difference between **due process** and **equal protection**?
3. Why is **Brown v. Board of Education** an equal protection case rather than an incorporation case?
4. How did **Gitlow v. New York** change federalism?
5. Why does **Cooper v. Aaron** matter when states resist federal court rulings?

## Introduction

The Fourteenth Amendment is usually taught in AP Gov as part of civil liberties and civil rights, but it is also a major federalism topic. That is because it changed the relationship between states and the national government. Before it, states had much more freedom to regulate rights within their own borders. After it, the federal Constitution increasingly limited what states could do.

For AP exam purposes, the main idea is this: the Fourteenth Amendment strengthened national protection of rights against **state action**. It did this in two especially important ways. First, the **Due Process Clause** became the basis for applying most of the Bill of Rights to the states. Second, the **Equal Protection Clause** became a tool for striking down discriminatory state laws and practices.

> **Key Term: Fourteenth Amendment**
> The amendment ratified in **1868** that, among other things, prevents states from depriving any person of life, liberty, or property without due process of law and from denying equal protection of the laws.

### The starting point: from state autonomy to national limits

To understand why the Fourteenth Amendment matters for federalism, start with the earlier system. Under the original Constitution, states kept broad authority over most daily life. The Bill of Rights was mainly understood as a limit on the national government, not on state governments.

That was made clear in **Barron v. Baltimore (1833)**. The Supreme Court ruled that the Bill of Rights restricted only the federal government. This meant that if a state government limited speech, denied a jury, or interfered with property, the federal Bill of Rights did not automatically protect the individual.

> **Key Term: Barron v. Baltimore (1833)**
> A Supreme Court case holding that the Bill of Rights originally applied only to the national government, not to the states.

This is why the Fourteenth Amendment was such a turning point. After the Civil War, Congress and the states added new constitutional language directly aimed at state governments. The key words are “**No State shall**.” That phrase matters because it placed direct constitutional restraints on the states.

Section 1 contains three phrases students should know well:

- **Privileges or Immunities Clause**
- **Due Process Clause**
- **Equal Protection Clause**

For AP Gov, the last two are the most tested. The Privileges or Immunities Clause appears in the text, but the Supreme Court read it narrowly in **The Slaughter-House Cases (1873)**, so it did not become the main path for rights protection.

> **Key Term: Due Process Clause**
> The part of the Fourteenth Amendment that says states may not deprive any person of life, liberty, or property without due process of law.
>
> **Key Term: Equal Protection Clause**
> The part of the Fourteenth Amendment that says states may not deny any person equal protection of the laws.

The federalism effect was huge. States still had reserved powers under the **Tenth Amendment**, but they no longer had full freedom when those powers conflicted with federally protected rights. In other words, the Fourteenth Amendment did not end federalism, but it put stronger national constitutional boundaries around state power.

> **Test Tip:** A common AP mistake is to say the Fourteenth Amendment “gave rights” in a broad, vague way. Stronger answers explain that it placed **national constitutional limits on state governments**, especially through due process and equal protection.

### Due process and selective incorporation

The most important Fourteenth Amendment change for civil liberties was **selective incorporation**. This is the process by which the Supreme Court applied most protections in the Bill of Rights to the states, usually through the Fourteenth Amendment’s Due Process Clause.

> **Key Term: selective incorporation**
> The process by which the Supreme Court applied most Bill of Rights protections to the states through the Fourteenth Amendment’s Due Process Clause.

Why did this matter for federalism? Because it shifted power toward the national judiciary. If a state passed a law restricting speech, religion, criminal procedure, or gun possession, that law could now be challenged under the federal Constitution. State judges and legislators no longer had the last word.

The key bridge case is **Gitlow v. New York (1925)**. Gitlow involved a state conviction related to speech. The Court upheld Gitlow’s conviction, but the more important long-term point was that it stated freedom of speech and press were fundamental liberties protected from state infringement by the Fourteenth Amendment.

> **Key Term: Gitlow v. New York (1925)**
> A major early incorporation case in which the Supreme Court held that First Amendment speech and press protections apply to the states through the Fourteenth Amendment.

Students often miss an important distinction here. **Gitlow** did not mean every part of the Bill of Rights applied to the states all at once. Incorporation happened one right at a time through later cases. That is why it is called selective incorporation, not total incorporation.

A few useful examples show how this developed:

- **Gitlow v. New York (1925)** — First Amendment speech and press
- **Gideon v. Wainwright (1963)** — Sixth Amendment right to counsel
- **McDonald v. Chicago (2010)** — Second Amendment right to keep and bear arms in the home

**McDonald v. Chicago** is especially useful because it ties Unit 1 federalism to Unit 3 civil liberties. Chicago tried to enforce local handgun restrictions after **District of Columbia v. Heller** recognized an individual right to bear arms against the federal government. The Court ruled in **McDonald** that this right also limits the states because of the Fourteenth Amendment.

> **Key Term: McDonald v. Chicago (2010)**
> A Supreme Court case holding that the Second Amendment applies to the states through the Fourteenth Amendment.

Here is the federalism logic step by step:

1. The Bill of Rights once limited only the national government.
2. The Fourteenth Amendment created constitutional restraints on states.
3. The Supreme Court used due process to incorporate many rights.
4. States now had to obey federal constitutional rules in these areas.

That is a major shift away from the older idea that each state could define these liberties for itself.

There are still limits. Most Bill of Rights protections have been incorporated, but not all. For AP purposes, common examples still treated as not fully incorporated include:

- Third Amendment protection against quartering soldiers
- Fifth Amendment grand jury indictment requirement
- Seventh Amendment civil jury trial guarantee

This is why good AP answers say **most, not all**.

A final distinction students should know is the difference between **procedural due process** and **substantive due process**.

- **Procedural due process** is about fair methods and legal procedures
- **Substantive due process** is about whether government may infringe certain fundamental rights at all

For this Unit 1 subtopic, procedural due process connects clearly to incorporation and criminal procedure. Substantive due process can appear in broader civil liberties debates, but the federalism point remains the same: the national Constitution increasingly limits state action.

> **Key Term: procedural due process**
> The principle that government must use fair procedures when acting against an individual.
>
> **Key Term: substantive due process**
> The principle that some rights are so fundamental that government may not infringe them without strong justification.

### Equal protection, state action, and school segregation

If due process explains the Fourteenth Amendment’s role in civil liberties, **equal protection** explains its role in civil rights. Equal protection focuses on whether government is treating people unfairly or discriminatorily under the law.

The clearest AP example is **Brown v. Board of Education (1954)**. Brown held that racial segregation in public schools violated the Equal Protection Clause. It overturned the old “separate but equal” idea from **Plessy v. Ferguson (1896)** in the field of education.

> **Key Term: Brown v. Board of Education (1954)**
> A Supreme Court case ruling that racial segregation in public schools violates the Equal Protection Clause of the Fourteenth Amendment.

Brown is not an incorporation case. That distinction matters. Brown did not apply a Bill of Rights freedom to the states. Instead, it said that a state-run school system could not classify and separate students by race in a way that denied equal protection.

Why is Brown a federalism case as well as a civil rights case? Because education is usually seen as a state and local function. Brown showed that even in an area of traditional state control, states must obey national constitutional standards. The decision therefore narrowed state discretion.

Another key idea is the **state action doctrine**. The Fourteenth Amendment usually applies to government conduct, not purely private behavior. The text says “No State shall,” so there generally must be state involvement.

> **Key Term: state action doctrine**
> The principle that the Fourteenth Amendment generally applies to government action, not purely private conduct.

This helps explain why some discrimination issues required congressional legislation, such as the **Civil Rights Act of 1964**, rather than relying only on the Fourteenth Amendment. The amendment itself is not a blank check to regulate every private act of discrimination.

Still, when states themselves discriminate, equal protection gives the federal courts major power to intervene. That is why Brown became such a turning point. It made state governments answer to a national standard of equality.

### Federal supremacy and resistance from the states

A constitutional right means little if states can ignore it. That is why **Cooper v. Aaron (1958)** is so useful for this topic. After Brown, Arkansas officials resisted desegregation. In Cooper, the Supreme Court made clear that states are bound by the Court’s interpretation of the Constitution and cannot nullify federal constitutional rulings.

> **Key Term: Cooper v. Aaron (1958)**
> A Supreme Court case holding that state officials must follow Supreme Court interpretations of the Constitution.

This case reinforces **federal supremacy** in rights disputes. States cannot say, “We disagree with Brown, so we will not follow it.” Once the Supreme Court interprets the Fourteenth Amendment, state officials are expected to comply.

That gives you a powerful federalism chain:

- **Barron**: rights limit only the federal government
- **Fourteenth Amendment**: states are now directly limited
- **Gitlow/McDonald/Gideon**: many rights are incorporated against states
- **Brown**: states may not deny equal protection
- **Cooper**: states must obey Supreme Court constitutional rulings

This chain is one of the best ways to answer argument or comparison questions on this topic.

There is, however, an important balance to keep in mind. The Fourteenth Amendment increased federal authority over the states, but it did not erase all state power. States still control many policy areas. What changed is that they must exercise those powers within federal constitutional limits.

> **Test Tip:** If an FRQ asks how the Fourteenth Amendment changed federalism, do not stop at “it expanded rights.” Go further: it **shifted authority toward the national government and Supreme Court by limiting state action through due process and equal protection**.

## Key Point Checklist

_This article has covered the following key knowledge points:_

- The **Fourteenth Amendment** was ratified in **1868** and placed direct constitutional limits on state governments
- **Barron v. Baltimore (1833)** held that the Bill of Rights originally applied only to the federal government
- The **Due Process Clause** became the main route for applying most Bill of Rights protections to the states
- **Selective incorporation** happened case by case, not all at once
- **Gitlow v. New York (1925)** was a major early incorporation case for speech and press
- **McDonald v. Chicago (2010)** applied the Second Amendment to the states through the Fourteenth Amendment
- **Equal protection** deals with equal treatment under the law, while **due process** deals with fair procedures and protected liberty
- **Brown v. Board of Education (1954)** used the Equal Protection Clause to strike down school segregation
- The **state action doctrine** means the Fourteenth Amendment usually applies to government conduct, not purely private action
- **Cooper v. Aaron (1958)** reinforced that states must follow Supreme Court constitutional rulings
- The Fourteenth Amendment increased **federal constitutional oversight** of the states
- Most, but not all, Bill of Rights protections have been incorporated against the states

## Key Terms and Concepts

- Fourteenth Amendment
- Barron v. Baltimore (1833)
- Due Process Clause
- Equal Protection Clause
- selective incorporation
- Gitlow v. New York (1925)
- McDonald v. Chicago (2010)
- procedural due process
- substantive due process
- Brown v. Board of Education (1954)
- state action doctrine
- Cooper v. Aaron (1958)


Constitutional Interpretations of Federalism - Fourteenth Amendment protections