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Why do political parties exist? Political parties help people organize around shared goals, win elections, build governing coalitions and turn ideas into public policy.
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- What Is the Purpose of a Political Party?
- Why Do Elected Officials Need Political Parties?
- Why Does Winning a Political Majority Matter?
- What Role Do Political Parties Play in Democracy?
- How Do Political Parties Make Governing More Difficult?
- Keep Exploring
Political parties help people with broadly shared ideas organize, win elections and govern. They create coalitions of elected officials who can work together to move legislation, set priorities and pursue a governing agenda.
But parties also organize political power. Winning a majority can determine who leads legislative bodies, chairs committees and helps decide which proposals receive hearings or votes.
That creates an important tension: political parties need to win elections in order to govern, but the incentive to win can sometimes compete with the work of solving problems.
What Is the Purpose of a Political Party?
The basic purpose of a political party is to organize people with broadly shared political goals so they can win elections, build governing coalitions and turn their ideas into public policy.
Political parties aren't established in the U.S. Constitution. In fact, some of the Founders worried about the problems political factions could create.
They formed almost immediately anyway.
An elected official might have a great proposal for lowering healthcare costs, improving schools or fixing infrastructure. But they need enough other elected officials to agree and vote to move the idea forward.
Political parties make that easier.
Passing a bill is not easy, even with party coalitions.
As of August 10, 2026, Michigan lawmakers had introduced 3,372 House and Senate bills during the current legislative session, excluding resolutions. Of those, 167 had become Public Acts — about 5%.
- House: 2,231 bills introduced; 97 enacted — 4.3%
- Senate: 1,141 bills introduced; 70 enacted — 6.1%
There are plenty of reasons a bill may not become law. Some never make it out of committee. Some don't have enough support. Some are introduced primarily to start a conversation or establish a position. Others are amended, combined with other legislation or simply never brought up for a vote.
But the numbers illustrate something important: having an idea and introducing a bill are not the same thing as having the political power and support necessary to turn that idea into law.
To move an idea through the legislative process, lawmakers have to build enough support around it. That's where political parties come in.
Why Do Elected Officials Need Political Parties?
Political parties make governing easier by creating ready-made coalitions of elected officials who already share some broad priorities.
Imagine hundreds of elected officials, each with their own priorities, trying to assemble a completely new coalition every time they needed to pass a budget, fix a road, change a tax, fund a school or address a national problem.
Political parties create a ready-made coalition of people who already share some broad priorities about how government should work. They develop priorities, recruit and support candidates, help voters understand generally what candidates stand for, and help elected officials coordinate once they're in office.
But political parties do something else that's important to understand: They organize political power.
Why Does Winning a Political Majority Matter?
Winning a majority matters because the majority party has considerably more power to set the legislative agenda.
When you vote for a state representative or member of Congress, you're choosing an individual to represent you. But that election also helps determine something bigger: which party controls the chamber.
The majority party gains significant institutional power. Depending on the legislative body, it can:
- elect leadership;
- chair committees;
- influence which bills receive hearings; and
- help determine which proposals make it to a vote.
The minority party still participates. Its members introduce legislation, serve on committees, debate, negotiate, propose amendments and vote.
But winning the majority gives a party considerably more power to set the agenda and determine which proposals have an opportunity to become law.
If Democrats win a majority, they have more power to pursue a Democratic governing agenda. If Republicans win a majority, they have more power to pursue a Republican governing agenda.
That's why control of the House, Senate, state legislatures and other governing bodies matters so much to political parties. That's why political parties aren't trying to win just one election. They're trying to elect enough of their candidates to become the majority.
What Role Do Political Parties Play in Democracy?
Political parties allow people with enough common ground to form governing coalitions, present competing approaches to voters and give voters a way to hold those coalitions accountable.
People disagree about how to govern. Parties allow people with enough common ground to form coalitions, present competing approaches to voters and, if voters give them enough support, try to put those approaches into practice.
Parties also give voters a way to hold governing coalitions accountable. Instead of evaluating hundreds of elected officials as completely independent actors, voters can evaluate both the individual and the broader agenda their party has pursued.
If Republicans control government and voters don't like the results, they can elect Democrats. If Democrats control government and voters don't like the results, they can elect Republicans.
Competition can be healthy. Different perspectives can expose weaknesses in an idea, challenge assumptions and produce better solutions.
But there's a tension built into the system.
How Do Political Parties Make Governing More Difficult?
The same political competition that gives voters meaningful choices can also create incentives that make governing more difficult.
If your party believes its approach will produce better results, it makes sense that you want your party to win.
- To implement your ideas, you need votes.
- To get votes, you need elected officials.
- To control more of what government does, you need a majority.
- And to keep that power, you need to win the next election.
So political parties have two goals operating at the same time:
Govern effectively.
And:
Win enough elections to have the power to govern.
Most of the time, those goals can reinforce each other. If you govern well, presumably voters will reward you.
But not always.
Sometimes helping the other party pass a good idea also helps the other party claim a political victory. That creates a strategic incentive that has nothing to do with whether the underlying idea is good or bad.
Sometimes preventing the other party from accomplishing something can be politically advantageous, even when eventually solving the underlying problem would benefit everyone.
And sometimes a disagreement really is fundamental. The parties may agree that a problem exists but have genuinely incompatible ideas about what should be done about it.
That creates one of the central tensions in democratic government:
We need political parties to organize people well enough to govern. But because governing power depends on winning elections, the organizations we use to solve problems also have an incentive to compete for control.
The competition isn't necessarily the problem.
Different ideas about government can be useful. People with different political instincts may notice different risks, ask different questions and see weaknesses in solutions that others miss.
The challenge is what happens when winning becomes more important than solving — when the success of the other party starts to feel like your failure, even if the community itself would benefit.
Keep Exploring
Political parties help explain how people organize political power. But that's only part of the picture. What do all the political labels we use actually mean? What do Democrats and Republicans generally believe? Why can people look at the same problem and reach different conclusions? And what happens when political rhetoric gets in the way of solving those problems?
Download the complete guide, Beyond Political Labels: How We Think, Govern, and Build Thriving Communities, for the full discussion of political parties, political beliefs, psychology, rhetoric and how we work together when we disagree.
Content Disclaimer: Our team researches information from official websites, news outlets, and other public resources to make it easier for Michigan residents to stay informed. We strive to provide accurate, balanced, and up-to-date information, but we may occasionally miss updates or changes. Michigan Women is a 501(c)(3) non-profit organization and does not support or oppose any political candidate or party. This content is intended solely for civic education and public awareness.
