---
title: "Sixth Party System | Intro to American Government"
description: "Sixth Party System is the current era of U.S. party politics, marked by Democratic-Republican dominance, polarization, and sharper ideological sorting."
canonical: "https://fiveable.me/fundamentals-american-government/key-terms/sixth-party-system"
type: "key-term"
subject: "Intro to American Government"
unit: "Unit 9"
---

# Sixth Party System | Intro to American Government

## Definition

The Sixth Party System is the current era of U.S. politics in Intro to American Government, where Democrats and Republicans dominate and voter coalitions are more polarized and ideologically sorted.

## What It Is

The Sixth Party System is the current period of American party politics in Intro to American Government, when the Democratic and Republican parties dominate elections, government control, and most political debate. In this system, the old habit of voters switching parties more often has weakened, and party identity now shapes how many people vote, talk about policy, and see government itself.

What makes this system stand out is not just that there are two major parties, but that those parties are more internally unified and more different from each other than in earlier eras. Democrats and Republicans tend to cluster around distinct positions on issues like taxes, abortion, climate policy, gun regulation, immigration, and the role of government in the economy. That sharper sorting is what people usually mean when they talk about polarization.

This period emerged in the late 20th century and has continued into the 21st century as older regional coalitions broke down and new ones formed. In the South, for example, many white conservative voters moved away from the Democratic Party over time, while many urban, suburban, and minority voters became more reliable Democratic voters. At the same time, the Republican Party became the main home for many conservative voters across the country.

The Sixth Party System is also shaped by modern campaigning. Television, cable news, social media, fundraising networks, and nationalized issue messaging make it easier for party labels to matter everywhere, not just in one state or region. That means a congressional race, a presidential race, and even a local race can all feel tied to the same national party conflict.

A helpful way to think about it is this: if earlier party systems were about which coalition could hold together, the Sixth Party System is about how stable and sorted the two coalitions have become. You are not just looking at two parties, you are looking at a political environment where the parties are more ideologically distinct, voters are more loyal, and compromise is harder to reach.

## Why It Matters

This term matters because it gives you a map for reading modern U.S. politics instead of treating every election like a one-off event. When you know you are in the Sixth Party System, you can explain why party labels predict voting behavior so strongly, why Congress often feels stuck, and why campaigns focus so much on base turnout and messaging.

It also helps you connect party politics to other topics in Intro to American Government, especially elections, public opinion, and policymaking. A candidate does not just compete for votes, they also try to activate a party coalition that already has strong beliefs and identities. That changes how candidates speak, how interest groups organize, and how lawmakers decide whether to compromise.

You will also see this term when a class asks why political polarization feels so intense. The answer is not only that politicians disagree more, but that the parties themselves now sort voters, officials, donors, and media audiences into separate camps. The Sixth Party System is the structure behind that pattern.

## Connections

### Political Realignment

The Sixth Party System comes out of realignment, which is the long-term shift of voter groups from one party coalition to another. In American government, realignment helps explain why the old New Deal coalition weakened and why new voting patterns formed around region, race, ideology, and education.

### Polarization

Polarization is one of the clearest signs of the Sixth Party System. Instead of parties overlapping a lot on policy, they now tend to move farther apart, so party identity becomes a stronger shortcut for predicting views on major issues and even everyday political judgments.

### [Party Ideology](/fundamentals-american-government/key-terms/party-ideology)

Party ideology is the set of beliefs a party is known for, and the Sixth Party System is built around stronger ideological branding. That means you can often trace where a party stands on the role of government, social policy, and economic regulation by looking at how its base and leaders line up.

### [Realigning Elections](/fundamentals-american-government/key-terms/realigning-elections)

Realigning elections are the elections that help create a new party system by reshaping coalitions and voting habits. In a government class, these are the turning points that show how the country moved from one party era to another and why modern party patterns became stable.

## On the AP Exam

A quiz question might ask you to identify the Sixth Party System from a description of modern party politics, strong partisan loyalty, or deep Democratic-Republican polarization. In an essay, you might use it to explain why recent elections feel so nationalized and why divided government often leads to gridlock. If you are given a political cartoon, graph, or campaign example, look for signs that voters are sorted into two highly consistent partisan camps. You may also be asked to compare it with an earlier party system and explain what changed in the coalitions.

## Sixth Party System vs Fourth Party System

The Fourth Party System is an earlier era of American politics, not the current one. Students sometimes mix them up because both describe long stretches of party competition, but the Fourth Party System is tied to an older coalition structure, while the Sixth Party System is the modern era of stronger polarization and more rigid party loyalty.

## Key Takeaways

- The Sixth Party System is the current era of American party politics, defined by Democratic and Republican dominance.
- It is marked by stronger polarization, so the parties disagree more sharply on major policy issues.
- Voters are more likely to stay loyal to one party, which makes party identity a powerful predictor of political behavior.
- This system grew out of long-term realignment, not a single election or campaign.
- It helps explain why modern elections, media coverage, and lawmaking often feel nationalized and highly partisan.

## FAQs

### What is the Sixth Party System in Intro to American Government?

It is the current era of U.S. party politics, where Democrats and Republicans are the main dominant parties. The system is known for sharper ideological differences, stronger partisan loyalty, and a more polarized political environment.

### How is the Sixth Party System different from earlier party systems?

Earlier systems often had different coalitions, weaker party sorting, or less consistent ideological separation between the parties. The Sixth Party System stands out because the two major parties are more nationally organized and more clearly split on policy.

### What causes the Sixth Party System?

It developed over time through political realignment, changes in voter demographics, and the rise of modern media and campaign strategy. Those shifts helped create more stable Democratic and Republican coalitions and made party labels more powerful.

### Why does the Sixth Party System matter for elections?

It helps explain why many elections are decided by turnout and party loyalty instead of lots of persuadable swing voters. When parties are highly polarized, campaigns focus more on mobilizing their own supporters and framing the other party as the main opponent.

## Related Study Guides

- [9.1 What Are Parties and How Did They Form?](/fundamentals-american-government/unit-9/1-parties-form/study-guide/5WIThl63TiEuV2os)

## About This Document

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- [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns
- [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing
- [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`)
- [MCP server for AP teachers](https://fiveable.me/mcp/teachers): a teacher's classes, assignments and AP-rubric grading (`https://fiveable.me/api/mcp/teacher`)

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