AP United States Government and Politics, AP exams, 20–27%

Unit 5: Political Participation

Unit 5 covers voting, parties, interest groups, campaigns, elections, and the media. Constitutional amendments and legislation that expanded the franchise anchor the unit, and campaign finance is treated through a required Supreme Court case. This is the second most heavily weighted unit in the course.

Position: 5 of 5 units
Published weighting: 20–27% in the official framework
Topics covered: 7 topics in this guide

What is covered

Topics inside this unit.

These topics describe the scope students most often review for this part of AP United States Government and Politics. Treat them as a study checklist rather than an exhaustive list of what a single exam form can sample.

Voting rights and voter behavior: The Fifteenth, Seventeenth, Nineteenth, Twenty-Fourth, and Twenty-Sixth Amendments and the Voting Rights Act, plus rational-choice, retrospective, prospective, and party-line voting models.
Voter turnout: Structural barriers, registration rules, election type, and demographic factors that shape who actually votes.
Political parties: Party functions, how parties adapt to demographic and technological change, and the obstacles third parties face.
Interest groups and social movements: Lobbying, litigation, and mobilization strategies, free-rider problems, and the influence of organized interests on policy.
Presidential and congressional elections: Primaries and caucuses, the electoral college, incumbency advantage, and midterm dynamics.
Campaign finance: Contribution limits, political action committees and super PACs, and Citizens United v. FEC as the required case.
The media and political communication: Gatekeeping and agenda-setting, the shift to fragmented and social media, and consequences for political knowledge.

Study tips

How to practice Participation.

Section-specific guidance that follows from how this material is usually tested.

Memorize the suffrage amendments with the exact group each enfranchised; imprecision loses evidence points.
Prepare a short argument for and against the electoral college with evidence for each side.
Study campaign finance as a chain of court decisions and statutes rather than isolated facts.

Where this fits

Unit 5: Political Participation is 5 of 5 units in the AP United States Government and Politics guide, and it carries a published weighting of 20–27% in the official framework. Use the full guide to balance it against everything else you have to review.

Back to the AP United States Government and Politics guide Official exam information

Sample Participation questions

Practice questions, not yet expert-reviewed

Original practice questions written to the published framework for this section. No expert has reviewed them, and they are not taken from any official exam. Try each one before you open the answer.

Question 1Foundational
Which constitutional amendment lowered the national voting age to eighteen?
1. AThe Twenty-Sixth Amendment
2. BThe Nineteenth Amendment
3. CThe Twenty-Fourth Amendment
4. DThe Fifteenth Amendment
Show answer
Answer: A. The Twenty-Sixth Amendment
The Twenty-Sixth Amendment, ratified in 1971, set the voting age at eighteen for federal and state elections. The Twenty-Fourth Amendment is the tempting distractor because it also expanded access to the ballot, but it did so by banning poll taxes in federal elections.
Key insight: Sort the suffrage amendments by the barrier each removed: race in the Fifteenth, sex in the Nineteenth, poll taxes in the Twenty-Fourth, and age in the Twenty-Sixth.
Question 2Foundational
How many electoral votes must a presidential candidate receive to win the presidency without the election going to the House of Representatives?
1. A270
2. B218
3. C435
4. D538
Show answer
Answer: A. 270
There are 538 electors, so an absolute majority is 270. The 538 distractor is the total pool of electors rather than the majority needed, and 218 is the majority of the 435-seat House.
Key insight: If no candidate reaches 270, the House chooses the president with each state delegation casting one vote.
Question 3Intermediate
Which required Supreme Court case held that limits on independent political spending by corporations and unions violate the First Amendment?
1. ACitizens United v. Federal Election Commission
2. BBuckley v. Valeo
3. CBaker v. Carr
4. DSchenck v. United States
Show answer
Answer: A. Citizens United v. Federal Election Commission
Citizens United treated independent political spending as protected speech and struck down restrictions on corporate and union expenditures. Buckley v. Valeo is the tempting distractor because it first equated spending with speech, but it addressed individual and campaign spending limits rather than corporate and union expenditures.
Key insight: Citizens United left direct contribution limits to candidates intact; what it freed was independent spending.
Question 4Intermediate
Which kind of political committee may raise and spend unlimited amounts on independent expenditures but may not contribute directly to a candidate's campaign?
1. AA super PAC
2. BA traditional connected PAC
3. CA leadership PAC
4. DA national party committee
Show answer
Answer: A. A super PAC
Super PACs, formally independent expenditure-only committees, face no contribution or spending caps but are barred from giving money to or coordinating with campaigns. A traditional PAC is the tempting distractor because it may give directly to candidates, but exactly for that reason its contributions are capped.
Key insight: Unlimited money buys independence, not access: a super PAC that coordinates with a campaign loses its legal footing.
Question 5Advanced
Which model of voting behavior explains a ballot cast as a verdict on how well the incumbent party has already governed?
1. ARetrospective voting
2. BProspective voting
3. CParty-line voting
4. DRational-choice voting
Show answer
Answer: A. Retrospective voting
Retrospective voting judges past performance, which is why economic conditions in the year before an election predict incumbent support so well. Prospective voting is the tempting distractor, but it turns on promises about future policy rather than on a record already established.
Key insight: Retrospective voting looks backward at results, prospective voting forward at platforms, and party-line voting at the label alone.

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Unit 5: Political Participation