AP US Government and Politics study materials
AP US Government and Politics study resources

AP US Government and Politics cheat sheet

AP US Government and Politics · Keep the key ideas within reach.

Quick reference

Foundations of American Democracy

  • The Constitution's structure reflects compromise: the Great (Connecticut) Compromise created a bicameral Congress with population-based House seats and equal state representation in the Senate.

  • The Three-Fifths Compromise counted enslaved persons as three-fifths of a person for apportionment and direct taxation; the slave trade could not be banned before 1808.

  • Federalist No. 10 (Madison) argues a large republic controls faction better than a small one because competing interests multiply and majority coalitions are harder to form.

  • Federalist No. 51 (Madison) argues ambition must counteract ambition and that separating powers with checks and balances protects liberty.

  • Brutus No. 1 (Anti-Federalist) warns that a large central government will be distant from the people and that the necessary-and-proper clause plus supremacy clause threaten state power.

  • The Articles of Confederation lacked power to tax, regulate interstate commerce, or raise an army directly; Shays' Rebellion exposed these weaknesses.

  • Constitutional amendment requires two-thirds of each chamber of Congress to propose and three-fourths of state legislatures (or conventions) to ratify.

  • The Connecticut and Virginia Plans differed on representation; the New Jersey Plan preserved equal state voting in a unicameral legislature.

  • Federalism types: dual (layer cake, separate spheres), cooperative (marble cake, shared functions), and fiscal federalism through grants-in-aid.

Quick reference

Interactions Among Branches of Government

  • Congressional incumbency advantage stems from casework, franking, pork-barrel spending, and higher name recognition; House reelection rates typically exceed 90 percent.

  • A filibuster in the Senate requires 60 votes to invoke cloture; the nuclear option allows a simple-majority rule change on certain nominations.

  • The House Rules Committee sets terms of floor debate; the Senate lacks a comparable structured rules process, relying on unanimous consent.

  • Presidential vetoes can be overridden by two-thirds of both chambers; pocket vetoes occur only when Congress adjourns within 10 days of presentment.

  • Executive orders carry force of law but can be overturned by statute, judicial review, or a subsequent executive order; they do not require congressional approval.

  • Judicial review was established in Marbury v. Madison (1803); stare decisis means courts generally follow precedent.

  • Senatorial courtesy and the blue-slip tradition give home-state senators influence over district court nominations; Supreme Court nominees face full Senate confirmation.

  • The War Powers Resolution (1973) requires the president to notify Congress within 48 hours of armed conflict and withdraw forces within 60 days absent authorization.

  • Bureaucratic oversight tools include congressional hearings, GAO audits, the appropriations power, and the Congressional Review Act.

Quick reference

Civil Liberties and Civil Rights

  • Selective incorporation applies most Bill of Rights protections to states through the Fourteenth Amendment's due process clause; the Second Amendment was incorporated in McDonald v. Chicago (2010).

  • Establishment Clause tests: Lemon v. Kurtzman (1971) requires secular purpose, primary effect neither advancing nor inhibiting religion, and no excessive entanglement; Kennedy v. Bremerton (2022) shifted toward historical practice.

  • Tinker v. Des Moines (1969) protects student symbolic speech unless it causes substantial disruption; Schenck v. United States (1919) created the clear-and-present-danger test.

  • Miranda v. Arizona (1966) requires warnings before custodial interrogation; Gideon v. Wainwright (1963) requires counsel for felony defendants.

  • Mapp v. Ohio (1961) applied the exclusionary rule to states; the rule bars evidence obtained through unconstitutional searches.

  • Brown v. Board of Education (1954) overturned Plessy v. Ferguson (1896) separate-but-equal doctrine in public education.

  • Strict scrutiny applies to suspect classifications (race, national origin, religion) and fundamental rights; intermediate scrutiny applies to sex-based classifications under Craig v. Boren.

  • Civil Rights Act of 1964 Title II bars discrimination in public accommodations; Title VII bars employment discrimination based on race, color, religion, sex, or national origin.

  • Voting protections: Fifteenth Amendment (race), Nineteenth (sex), Twenty-Fourth (poll tax abolition), Twenty-Sixth (age 18).

Quick reference

American Political Ideologies and Beliefs

  • Political socialization agents ranked roughly by influence: family first, then school, peers, media, and religion; family transmission is strongest for party identification.

  • Libertarians favor limited government in both economic and social spheres; populists/conservatives favor government action on social issues but less economic regulation.

  • Public opinion polling accuracy depends on random sampling, adequate sample size (about 1,000 yields roughly ±3 percent margin at 95 percent confidence), and low nonresponse bias.

  • Exit polls and push polls differ: exit polls sample voters after voting, push polls present biased information disguised as a survey.

  • Ideological consistency in the U.S. electorate is low; many citizens hold cross-cutting views, producing 'ideological polarization' among elites but not always the mass public.

  • Key economic indicators used in politics: unemployment rate, inflation (CPI), GDP growth; consumer confidence and approval ratings track with economic conditions.

  • Realignment versus dealignment: realignment is durable party coalition shift (e.g., 1932 New Deal coalition); dealignment is weakening party attachment.

  • Generational and cohort effects shape attitudes; period effects (e.g., wars, recessions) can shift opinion across all ages simultaneously.

Quick reference

Political Participation

  • Voter turnout in U.S. presidential elections typically ranges from about 55 to 65 percent of the voting-age population; midterms run roughly 40 percent.

  • Structural turnout factors: registration requirements, Election Day timing (Tuesday), and felony disenfranchisement laws; the National Voter Registration Act (1993) expanded registration opportunities.

  • Rational choice models predict voting when benefits exceed costs; paradox of voting notes that individual votes rarely decide outcomes.

  • Linkage institutions include political parties, interest groups, elections, and the media; each connects citizens to government.

  • Interest group strategies: lobbying, litigation, electioneering, grassroots mobilization, and campaign contributions through PACs and super PACs (Citizens United, 2010).

  • Party functions: recruiting candidates, mobilizing voters, articulating policy positions, and organizing government (parties in Congress).

  • The Electoral College: each state gets electors equal to House seats plus two senators; 270 of 538 needed to win; winner-take-all in 48 states.

  • Media roles: agenda setting (what issues matter), framing (how issues are presented), and horse-race coverage emphasizing strategy over policy.