8 Political Parties
Learn how political parties connect citizens to government, organize elections and governing, compete under different party systems, and shape democratic choices.
What parties do
A is an organized group that seeks to win public office and influence government. Parties bring together candidates, voters, and political organizations around shared goals. They are not government agencies, and joining a party does not require agreeing with it on every issue.
Parties connect citizens to government by developing policy proposals, recruiting and nominating candidates, informing and mobilizing voters, and offering recognizable choices at elections. By combining concerns from different people and groups into a broader program, parties can build a . A party’s describes its policy priorities, although candidates and elected officials may differ from it.
Parties also help voters hold officials accountable. Voters can reward or reject a party based on its candidates’ records and the government’s performance. Party labels can simplify complex choices: voters may use a party’s general reputation to decide where to learn more, even if they disagree with some of its positions.
Party systems
A describes the pattern of competition among parties in a political system. Systems are often classified by how many parties have a realistic chance to win and govern.
In a , one party dominates political power and meaningful competition is restricted.
In a , two parties usually dominate elections and government.
In a , several parties can win seats and may need to form a government to govern together.
The United States is commonly described as a because the Democratic and Republican parties have long dominated national elections. This does not mean that only two parties exist. Minor parties and independent candidates also compete; they may draw attention to neglected issues, affect debate, or influence which major-party candidate wins, even when they do not gain office.
Parties in government
Parties organize government after elections. In Congress, members of each party meet in caucuses or conferences, choose leaders, coordinate legislative priorities, and work to build support for bills. The party holding the most seats is generally the majority party; the others are minority parties.
In a presidential system such as the United States, the president and Congress are elected separately, so different parties may control them at the same time. Parties can help officials coordinate, but they cannot guarantee agreement.
Election rules and party competition
Election rules help shape party systems. In many U.S. elections, a arrangement gives a district seat to the candidate who receives more votes than any other candidate. This can discourage support for smaller parties because voters may hesitate to support a candidate they think cannot win.
By contrast, allocates legislative seats according to parties’ shares of the vote, making it easier for several parties to gain representation. Election rules influence party competition, but do not determine it alone; political history, social divisions, and voter choices also matter.
Changing parties
Parties are not fixed coalitions: their voters, policy priorities, and internal groups can change over time. When many voters shift their loyalties and the parties’ coalitions change substantially, political scientists often describe the change as . Minor parties can contribute to change by raising issues or attracting voters who later influence a major party’s agenda.
Benefits and trade-offs
Parties can make representative government more organized and give citizens practical ways to participate. They can also intensify divisions, pressure officials to prioritize party unity, or leave some viewpoints underrepresented.
Their democratic value depends in part on whether they offer meaningful choices, represent citizens’ concerns, compete fairly, and respect the rules that allow political opposition.