Gerrymandering in AP Government: the two cases the exam actually tests.

What is gerrymandering? The AP Gov definition

Gerrymandering means shaping the boundaries of an electoral district so that one party, one incumbent or one group comes out ahead. It is not the same thing as redistricting, and the exam rewards keeping them apart: redistricting is the routine redrawing of district lines that follows each census, while gerrymandering is that process turned to partisan or racial ends. All gerrymandering happens through redistricting; most redistricting is not gerrymandering.

The word is older than the course. It was coined in 1812, after Massachusetts governor Elbridge Gerry signed a redistricting bill whose contorted new district was said to resemble a salamander.

College Board states the idea once, in a single essential knowledge statement, and everything the exam asks about it follows from that one sentence. The claim it makes is deliberately modest. Litigation has gone some way toward curbing rigged maps and lopsided representation, without settling the matter, and the avenue the courts opened is an equal protection one.

Where College Board puts gerrymandering

Gerrymandering appears in the course framework in one place: essential knowledge statement 2.3.A.2, inside Topic 2.3, Congressional Behavior, in Unit 2, Interactions Among Branches of Government. Its learning objective, 2.3.A, is about what shapes the way Congress acts: how its members reach office, how sharply the chamber divides along party lines, and whether one party holds both the presidency and a chamber. That is why the topic sits with Congress rather than with elections, and that placement is the first thing to get straight.

The placement explains the causal chain the exam actually asks about. A map drawn to favor one side manufactures seats nobody can lose. A member who cannot lose has little reason to court the middle and every reason to satisfy a primary electorate. Three consequences follow, and College Board names and defines all three in this same topic: partisan voting, polarization and gridlock.

That is the heaviest multiple-choice weighting any of the five units carries. Two other topics reach the same material: Topic 3.12 in Unit 3, which collects the rulings that have gone both ways on minority representation, and Topic 5.9 in Unit 5, congressional elections. Both required cases also carry back into Topic 1.7, where a state’s authority over its own maps runs up against national constraints, and the federalism ap government definition covers that side of it.

Packing and cracking, and what College Board calls them

Two techniques do most of the work, and all five competitor guides checked for this page use the same two names for them.

Both are real, both are worth knowing, and both are what the question stem will describe. But it is worth knowing where they come from. Searched across all 202 pages of the 2026 course and exam description, cracking appears zero times and packing appears once — and that one use is Franklin Roosevelt’s court-packing plan, listed as an optional illustrative example under a different topic entirely. Neither word is part of the examinable framework. Learn them as the vocabulary of the stem, not as something to write back in an answer.

Baker v. Carr (1962)

Baker v. Carr is the case that made districting reviewable at all, and College Board’s summary of it turns on a negative. A quarrel over district lines is not the sort of political question a federal judge has to decline. Removing that obstacle is what allows a later challenge to argue that a particular map breaches the Fourteenth Amendment’s equal protection clause.

Two things in that sentence are easy to lose. The first is that the ruling is about jurisdiction, not about any particular map: it opened a door rather than striking anything down. Deciding what a federal court may hear is the Court’s own power at work, which is the judicial review ap government definition. The second is the constitutional hook, which is the equal protection clause, and which is what an exam answer needs to name.

Most study material, including every competitor page checked for this guide, credits Baker with establishing one person, one vote. The phrase is a fair summary of the line of cases that followed, but it does not appear anywhere in College Board’s framework. If you have room for one attribution, use the equal protection clause.

Shaw v. Reno (1993)

Shaw v. Reno is the racial-districting case, and the standard College Board attaches to it is narrower than the one usually reported. As the framework puts it, a majority-minority seat of the kind the Voting Rights Act of 1965 encouraged becomes open to a voter’s challenge under the Fourteenth Amendment’s equal protection clause when race was the sole consideration behind its boundaries.

North Carolina had drawn such a seat after the 1990 census, in a shape that became the case’s defining image. The tension is the part worth carrying. Federal voting-rights law pushed states to create seats a minority bloc could realistically carry; Shaw held that the very same map was open to attack if race was what dictated where the lines fell.

Note the wording carefully, because two versions circulate. College Board’s required-case description says only factor. The Court’s own opinions in this line of cases speak of race as the predominant factor, which triggers strict scrutiny. The two are not identical, and the one your scorer is working from is College Board’s.

Racial and partisan gerrymandering are not treated alike

The distinction matters because the legal treatment genuinely differs, and because the exam tests the racial half far more directly than the partisan half.

Racial districting is course content twice over. Beyond Topic 2.3, essential knowledge statement 3.12.A.1 gathers rulings that have cut both ways for minorities, and among them it places the decisions in which the Court came down on the majority’s side and curtailed the drawing of majority-minority seats. That statement was one of five rewritten in the Fall 2026 clarifications, so it is current framework rather than legacy text.

Partisan gerrymandering is a different matter. In Rucho v. Common Cause (2019) the Supreme Court held that claims of partisan gerrymandering present a political question beyond the reach of the federal courts, leaving the issue to the states and to Congress. That is the law, and it is worth knowing. It is also not on College Board’s required list: neither Rucho nor the phrase partisan gerrymandering is anywhere in the course framework. Cite it as context; build an answer on Baker and Shaw.

College Board names the trap on this topic itself, in its guidance to teachers on Unit 2. Students bog down in a case’s particulars, or in whether its outcome strikes them as just, and the remedy it offers is to steer them back to the constitutional question the justices were actually deciding. On a subject this charged that is the whole discipline. Nobody is asking whether a map is fair. They are asking which clause it is being measured against.

How AP Gov tests gerrymandering

Topic 2.3 carries one suggested skill, SCOTUS Application 2.A, and what it asks for is an account of a required case from end to end: what happened, what was in dispute, how the Court came down, on what reasoning, and what the majority put in writing. That is not incidental. Skill Category 2 is the category free-response question 3 is built on.

Free-response question 3 is the SCOTUS Comparison. It is worth 4 points, 12.5 percent of the exam, with 20 minutes recommended. The prompt specifies one required Supreme Court case and asks you to compare it with a non-required one. Baker and Shaw are the two required cases this topic can supply, and the method for the SCOTUS Comparison free-response question is set out separately.

The topic also has a distinctive multiple-choice surface. College Board tells teachers that students will meet a map of a gerrymandered congressional district as a visual source, alongside data displays and political cartoons, so the skill being tested there is reading the stimulus rather than recalling the definition.

The wider format, for scale: the exam runs three hours, with 55 multiple-choice questions worth half the score in 80 minutes, and four free-response questions worth the other half in 100 minutes. Each free-response question is 12.5 percent of the exam even though the point values differ. Testing is fully digital in Bluebook; the 2027 administration falls on Tuesday, May 4.

Gerrymandering is one entry in a longer vocabulary, and the other AP Gov concept guides cover the rest of it.

Sources for this page: College Board’s AP U.S. Government and Politics Course and Exam Description, effective Fall 2026 — topic 2.3 and its learning objective, plus topic 3.12, topic 5.9, the skills table and the exam-information pages — together with the Fall 2026 clarifications document. Format and date details come from College Board’s own AP Central and AP Students sites. Last checked against those sources in September 2026 by Mahmudul Hasan.