AP Comparative Government Unit 2 ReviewPolitical Institutions

AP Comparative Government Unit 2, Political Institutions, is about how the six course countries (China, Iran, Mexico, Nigeria, Russia, and the United Kingdom) build their executive, legislative, and judicial branches, and how that design shapes who actually holds power. The single biggest idea is that institutional arrangements are not neutral; whether a country is parliamentary, presidential, or semi-presidential changes how policy gets made, how executives get removed, and how stable and legitimate the regime is. At 22-33% of the exam, this is the heaviest unit in the course, and almost every comparison question on the test touches it somewhere.

What this unit covers

Parliamentary, presidential, and semi-presidential systems

• Parliamentary systems like the UK fuse lawmaking and executive power. The legislature selects the prime minister and cabinet, and it can remove them. The PM is not separately elected by voters; the party (or coalition) that controls the House of Commons puts its leader in charge.
• Presidential systems like Mexico and Nigeria separate the branches. The president is elected directly for a fixed term, the cabinet answers mostly to the president, and the legislature can only remove cabinet members or the president through impeachment.
• Semi-presidential systems like Russia split the executive in two. A directly elected president shares power with a prime minister who is responsible to the legislature. In practice, Russia's version concentrates power heavily in the presidency.
• The tradeoff to remember is speed versus checks. Parliamentary systems pass policy with fewer institutional obstacles because the executive controls the legislature by definition. Presidential systems can hit gridlock when branches are divided, but that division is itself a check on power.
• Parliamentary systems still check their executives. Parliaments can censure cabinet ministers, refuse to pass government bills, question the PM and cabinet directly (think Prime Minister's Questions in the UK), and force new elections.

Executives: structure, term limits, and removal

• Every government has a chief executive and cabinet that formulate, implement, and enforce policy, but titles and powers vary widely across the six countries.
• China's president is also commander in chief, chair of the Central Military Commission, and General Secretary of the Chinese Communist Party. Holding all three posts at once is what makes the office powerful, not the title of "president" itself. In 2018, China removed presidential term limits, clearing the way for Xi Jinping to stay in office indefinitely.
• Iran has a dual executive. The Supreme Leader (unelected, chosen by the Assembly of Experts) sits above the directly elected president and controls the military, judiciary, and media.
• Mexico's president serves a single six-year term, the sexenio, with no reelection ever. Nigeria's president can serve two four-year terms. Russia's 2020 constitutional amendments reset Putin's term clock, letting him run again despite previously serving the limit.
• Term limits cut both ways. Advantages include checking executive power, blocking personality rule and would-be dictators, focusing leaders on governing instead of campaigning, and opening the door to new leaders and ideas. Disadvantages include forcing out effective, popular leaders and creating lame-duck periods.
• Removal procedures differ by system. The UK Parliament can remove a PM through a vote of no confidence. Mexico and Nigeria use impeachment. Iran's Majles can impeach the president, but the Supreme Leader has the final say. These procedures exist to control abuse of power, even where they are rarely used.

Legislatures and how independent they really are

• China's National People's Congress is unicameral and, on paper, the most powerful institution in the state. It elects the president, approves the premier, and legitimizes executive policy. In reality it mostly rubber-stamps decisions made elsewhere.
• Iran's unicameral Majles is elected and can approve legislation, oversee the budget, and impeach the president, but every bill it passes must survive review by unelected clerical bodies.
• The UK, Mexico, Nigeria, and Russia all have bicameral legislatures. The UK pairs an elected House of Commons (the real power) with an unelected House of Lords that can only delay bills. Mexico and Nigeria have elected senates and lower houses. Russia has the State Duma and the Federation Council.
• The big analytical question is legislative independence, meaning whether the legislature can actually act on its own. China's NPC is constrained by the Politburo Standing Committee, the true center of power, and by the NPC Standing Committee, which handles legislative duties most of the year, sets the agenda, and interprets the constitution. Iran's Majles is constrained by the Guardian Council (which vets candidates and can veto laws) and the Expediency Council (which resolves disputes between the Majles and Guardian Council).
• A legislature can look democratic on paper and still be hollow in practice. That formal-versus-actual-power gap is one of the most tested ideas in the unit.

Judiciaries and judicial independence

• China practices rule by law, not rule of law. The courts serve the Chinese Communist Party, which controls most judicial appointments. Law is a tool the state uses, not a limit on the state.
• Iran's judiciary exists mainly to keep the legal system grounded in religious law, so judges must be trained in sharia. The head of the judiciary is appointed by the Supreme Leader.
• The UK Supreme Court (created in 2009) is independent but limited. Because of parliamentary sovereignty, it cannot strike down acts of Parliament the way the US Supreme Court can strike down laws.
• Mexico and Nigeria have courts with judicial review on paper, but corruption and political pressure have historically weakened independence. Nigeria adds a layer of complexity with sharia courts operating in northern states.
• Judicial independence depends on specific, measurable things: whether courts can overrule the executive and legislature, how judges are appointed, how long their terms last, what qualifications they need, and how they can be removed.
• Independent judiciaries strengthen democracy by upholding rule of law and protecting rights, but authoritarian regimes deliberately keep courts weak or dependent so they cannot become an obstacle.

Unit 2, Political Institutions at a glance

Why Unit 2, Political Institutions matters in AP Comp Gov

This unit is the structural core of the whole course. Unit 1 gave you the vocabulary of regimes and legitimacy; Unit 2 shows you the actual machinery those regimes run on. Once you can describe how each country's branches are built and constrained, you can explain almost any outcome the course asks about.

• Institutional design directly shapes the course's recurring themes of power, legitimacy, and stability. A rubber-stamp legislature and a popular elected one both "pass laws," but they legitimize power in completely different ways.
• The unit trains the course's most important skill, which is comparing formal rules to actual practice. Russia's constitution looks semi-presidential; the reality is presidential dominance. China's constitution calls the NPC supreme; the Politburo Standing Committee decides.
• Six countries, three branches each, gives you the raw material for nearly every comparison the exam can throw at you.

How this unit connects across the course

• Unit 1 (Political Systems, Regimes, and Governments) supplies the regime categories (democratic, authoritarian, illiberal) that explain why institutions look the way they do. China's weak courts and Iran's vetted Majles only make sense once you know what kind of regime each one is.
• Unit 3 (Political Culture and Participation) picks up the citizen side. How people protest, vote, or stay silent depends heavily on whether institutions like independent courts and real legislatures exist to respond to them.
• Unit 4 (Party and Electoral Systems and Citizen Organizations) explains how people get into the institutions you study here. The UK's parliamentary system only makes sense alongside its electoral rules, and China's NPC only makes sense alongside the Communist Party's control of candidate selection.
• Unit 5 (Political and Economic Changes and Development) tests whether institutions can adapt. Reforms like Mexico's judicial strengthening or Russia's 2020 constitutional changes show institutions being deliberately redesigned to shift power.

Key documents, cases, and people

• Xi Jinping: China's president and CCP General Secretary; the 2018 removal of presidential term limits under his leadership is the course's go-to example of weakening executive constraints.
• Vladimir Putin: Russia's president; the 2020 constitutional amendments that reset his term count show how formal rules can be rewritten to extend personal power.
• The Supreme Leader of Iran: Unelected head of state who controls the military, judiciary, and media, sitting above the elected president in Iran's dual executive.
• Politburo Standing Committee: The actual center of power in China, constraining the NPC despite the constitution's wording.
• NPC Standing Committee: Handles legislative duties when the full NPC is out of session, sets its agenda, supervises member elections, and interprets China's constitution and laws.
• Guardian Council: Iran's unelected clerical body that vets candidates for office and can veto Majles legislation for violating Islamic law or the constitution.
• Expediency Council: Iranian body that resolves disputes between the Majles and the Guardian Council, further limiting legislative independence.
• House of Commons: The elected and dominant chamber of the UK Parliament; controlling it is what makes someone prime minister.
• House of Lords: The unelected upper chamber of the UK Parliament that can delay but not block legislation.
• UK Supreme Court (2009): An independent court created to separate the judiciary from the Lords, but still unable to strike down acts of Parliament.
• The Majles: Iran's elected unicameral legislature with budget oversight and impeachment power, hemmed in by unelected councils.

Unit 2, Political Institutions on the AP exam

At 22-33% of the exam, this is the single largest slice of AP Comp Gov, so institutional knowledge shows up everywhere, not just in questions labeled "institutions." Multiple-choice questions test whether you can identify which country matches a description ("a unicameral legislature constrained by an unelected clerical council") and read data or passages about institutional power. On the free-response side, this unit feeds every question type. Conceptual analysis questions ask you to define and explain ideas like judicial independence or the advantages of term limits. Comparative analysis questions ask you to compare an institutional feature across two course countries, like removal procedures in the UK versus Nigeria. The argument essay frequently hands you a prompt about institutional design (term limits, legislative independence, judicial power) and asks you to defend a claim with evidence from specific course countries. The skill that earns points is precision. "China's legislature is weak" earns less than "China's NPC formally elects the president, but the Politburo Standing Committee makes actual policy decisions." Always name the specific institution and the specific mechanism.

Essential questions

• How does the choice between parliamentary, presidential, and semi-presidential design change who holds power and how easily policy gets made?
• Why do some legislatures and courts hold real power while others with identical-sounding constitutional roles do not?
• Do executive term limits make countries more stable, or do they just trade one kind of risk for another?
• What does an independent judiciary actually require, and why do authoritarian regimes work to prevent it?

Key terms to know

• Parliamentary system: A system that fuses executive and legislative power, with the legislature selecting and able to remove the head of government and cabinet.
• Presidential system: A system with a separately elected, fixed-term executive whose cabinet answers to the president, removable by the legislature only through impeachment.
• Semi-presidential system: A hybrid with a directly elected president alongside a prime minister responsible to the legislature.
• Fusion of powers: The merging of executive and legislative authority that defines parliamentary systems.
• Vote of no confidence: A parliamentary vote that removes the prime minister and cabinet, typically triggering new elections or a new government.
• Impeachment: The formal legislative process for removing an executive or cabinet official in presidential systems.
• Coalition government: A government formed by multiple parties when no single party wins a legislative majority.
• Unicameral and bicameral: One-chamber legislatures (China, Iran) versus two-chamber legislatures (UK, Mexico, Nigeria, Russia).
• Legislative independence: The degree to which a legislature can act without being controlled by the executive, a party, or unelected bodies.
• Judicial review: The power of courts to overrule executive and legislative actions as unconstitutional.
• Rule of law versus rule by law: Under rule of law, the law binds everyone including the government; under rule by law, the government uses law as a tool while staying above it (China is the model case).
• Judicial independence: A judiciary's freedom from other branches, measured by appointment processes, term lengths, removal procedures, and the authority to overrule the other branches.
• Term limits: Constitutional caps on how long an executive can serve, designed to check power and block personality rule.
• Sexenio: Mexico's single, non-renewable six-year presidential term.

Common mix-ups

• "Removed term limits" does not mean the same thing in China and Russia. China abolished presidential term limits outright in 2018. Russia kept its limits but used the 2020 amendments to reset Putin's count to zero, so he can serve new terms under the existing rules.
• The UK Supreme Court is independent but not powerful in the American sense. Parliamentary sovereignty means it cannot strike down acts of Parliament, so do not claim it has full judicial review.
• China's NPC being called "the most powerful institution" in the constitution is a trap. Formal power and actual power are different, and the exam rewards you for knowing the Politburo Standing Committee is where decisions are really made.
• Iran's president is not Iran's most powerful executive. The unelected Supreme Leader outranks him, which is why Iran counts as a dual executive and not a normal presidential system.