Gerrymandering started well before it had a name: the tactic of drawing district lines to favor one faction appears in English parliamentary politics centuries before American independence, and Patrick Henry used it against James Madison in 1788. The word itself was born on February 11, 1812, when Massachusetts Governor Elbridge Gerry signed a redistricting bill whose contorted state senate districts prompted a Boston newspaper cartoon that fused his name with “salamander.”1Massachusetts Historical Society. The Gerrymander So the practice is older than the republic; the label is older than two centuries.
The Practice Before the Word
In England, “rotten boroughs” let the crown and aristocratic patrons control seats in the House of Commons for centuries. By the early 1800s, more than 140 of the 658 seats in Parliament came from these depopulated constituencies, some with fewer than 50 voters, while industrial cities like Birmingham and Manchester sent no one at all.2Encyclopaedia Britannica. Rotten Borough Old Sarum in Wiltshire, the most notorious example, had no houses or residents by the 1830s yet still elected two members of Parliament.3Newcastle University. Rotten Boroughs Britain’s Reform Act of 1832 finally stripped 56 boroughs of their seats and created 42 new ones to reflect actual population.
In the United States, the tactic appeared almost immediately after independence. In 1788, Patrick Henry, a leading Anti-Federalist who controlled Virginia’s General Assembly, drew an eight-county congressional district deliberately stacked with Anti-Federalist voters to prevent James Madison from winning a seat in the first Congress. Henry wanted to block Madison from proposing a Bill of Rights, which he feared would drain momentum for a second constitutional convention. He checked the political leanings of the district by reviewing how each county’s delegates had voted at Virginia’s ratifying convention; of the 16 delegates in the district, 11 had opposed the Constitution.4Politico. The Gerrymander That Gave America the Bill of Rights Madison won anyway, defeating James Monroe 1,308 to 972 in February 1789. The core technique, studying voters’ political loyalties and arranging boundaries to produce a desired result, predated the word by more than two decades.
Massachusetts, 1812: The Birth of the Word
The term comes from a specific moment. On February 11, 1812, Governor Elbridge Gerry signed a redistricting act that redrew Massachusetts state senate districts to benefit his Democratic-Republican Party. The plan worked: despite Federalist candidates winning a majority of the popular vote, the new map let the Jeffersonian Republicans capture roughly two-thirds of the legislative seats.1Massachusetts Historical Society. The Gerrymander
Gerry reportedly found the proposal “highly disagreeable,” but he signed it anyway. He lost the next governor’s race for it.5Library of Congress. Gerrymandering: The Origin Story
The backlash produced one of the most famous political cartoons in American history. According to an account traced to a memorandum by historian John Ward Dean, the image originated at a dinner party at the Boston home of merchant Israel Thorndike in February 1812, where Federalist newspapermen and political leaders examined a map of the newly drawn senate district in Essex County.1Massachusetts Historical Society. The Gerrymander The district’s long, contorted shape reminded someone of a salamander. Elkanah Tisdale, a Connecticut-born engraver and miniature painter, added a head, wings, and claws to the outline, turning it into a dragon-like creature. When an editor compared the shape to a salamander, someone retorted: “Salamander! Call it a Gerrymander.” The cartoon ran in the Boston Gazette on March 26, 1812, under the caption “The Gerrymander: a New Species of Monster,” was widely reprinted as a broadside, and the word entered permanent use.6Library of Congress. Elbridge Gerry and the Monstrous Gerrymander
A pronunciation footnote: while “gerrymander” is almost universally said with a soft G (like “Jerry”), Gerry himself pronounced his name with a hard G (as in “Gary”).5Library of Congress. Gerrymandering: The Origin Story
Who Elbridge Gerry Was
Gerry was more than a footnote about maps. Born in 1744 in Marblehead, Massachusetts, he signed the Declaration of Independence, served in the Continental Congress, sat in the U.S. House from 1789 to 1793, and attended the Constitutional Convention of 1787, where he refused to sign the Constitution over concerns about the balance between the states and the federal government.7Miller Center, University of Virginia. Elbridge Gerry – Vice President He later came around once the Bill of Rights was added. As governor of Massachusetts from 1810 to 1812, his name became permanently attached to redistricting abuse. He went on to serve as vice president under James Madison and died in office in November 1814.
Escalation in the 19th Century
Through the early republic, the practice extended well beyond drawing oddly shaped districts. States toggled between statewide “general ticket” (at-large) elections and district-based elections, picking whichever system maximized their ruling party’s advantage. Between 1789 and 1840, roughly one-quarter of all congressional seats were allocated through at-large slates.8New America. Where We Have Been: The History of Gerrymandering in America
Congress intervened with the Apportionment Act of 1842, which used its authority under Article I, Section 4 to mandate single-member districts for House elections. The Whig majority pushed the law to stop states from sending single-party delegations through at-large slates, which had favored Democrats. The mandate passed 113 to 87 on April 26, 1842.9U.S. House of Representatives. Apportionment and Redistricting – Part 1 The law curtailed one form of manipulation but locked in the structural framework, geographically defined single-member districts, within which line-drawing would flourish.
The decades after the Civil War brought the most aggressive gerrymandering the country had yet seen. Partisan loyalties were firm, control of state legislatures seesawed, and each side would redraw maps upon gaining power.8New America. Where We Have Been: The History of Gerrymandering in America No one-person, one-vote standard existed, so legislatures could create districts of wildly unequal size to amplify their advantage. After the 15th Amendment’s ratification in 1870 and the end of Reconstruction, Southern states used gerrymandering as a tool of racial exclusion, concentrating Black voters into a single district surrounded by overwhelmingly white ones.10National Association of Social Workers. Gerrymandering and Its Impact
When Courts Finally Stepped In
For much of the 20th century, federal courts treated redistricting as a political question they could not touch. Many state legislatures simply stopped redrawing their maps. In Alabama, some legislative districts held 41 times as many eligible voters as others.11Justia. Reynolds v. Sims, 377 U.S. 533
Two landmark rulings in the 1960s changed that. In Baker v. Carr (1962), the Supreme Court held 6–2 that challenges to legislative apportionment are justiciable under the Equal Protection Clause, opening the courthouse doors to redistricting lawsuits.12Federal Judicial Center. Baker v. Carr Two years later, in Reynolds v. Sims (1964), the Court established the “one person, one vote” principle, ruling that both chambers of a state legislature must be apportioned substantially on the basis of population. Chief Justice Earl Warren later called Baker the most significant case decided during his tenure. By 1964, the apportionment schemes of 15 states had been struck down.13National Constitution Center. On This Day: Supreme Court Reviews Redistricting
The standard eliminated the most extreme malapportionment but did not stop gerrymandering. Legislators could still draw equal-population districts while manipulating their shapes and compositions. If anything, the requirement to redraw maps every decade handed the party in power a regular, structured opportunity.
Race and the Voting Rights Act
The Voting Rights Act of 1965 reshaped redistricting in ways its authors may not have fully anticipated. Section 5 required jurisdictions with a history of discrimination to obtain federal “preclearance” before changing election laws, including maps.14National Affairs. Redistricting, Race, and the Voting Rights Act Southern jurisdictions responded by shifting to at-large elections and other schemes designed to dilute Black voting power. In Allen v. State Board of Elections (1969), the Supreme Court expanded Section 5 to cover these vote-dilution tactics. A critical amendment came in 1982, when Congress rewrote Section 2 to allow challenges based on discriminatory “result” rather than requiring proof of intent, overturning the Court’s holding in City of Mobile v. Bolden (1980).15Brennan Center for Justice. Section 2 of the Voting Rights Act and the Supreme Court
These changes spurred the creation of “majority-minority” districts: constituencies drawn so that racial or ethnic minorities make up a majority of voters. The framework for evaluating these claims was set in Thornburg v. Gingles (1986), which established a three-part test looking at whether the minority group is large and compact enough to form a district majority, whether the group is politically cohesive, and whether the white majority votes as a bloc to defeat the minority’s preferred candidate.16Constitution Annotated, Congress.gov. Racial Vote Dilution and Racial Gerrymandering
The effort soon collided with the Equal Protection Clause. In Shaw v. Reno (1993), the Court recognized for the first time that redistricting plans could be challenged as unconstitutional racial gerrymanders, even when drawn to help minorities, if race was the predominant factor shaping the boundaries.17NCSL. Redistricting and the Supreme Court: The Most Significant Cases That tension has driven redistricting litigation ever since.
Partisan Gerrymandering: The Door Opens and Closes
While racial gerrymandering claims found a solid footing, partisan gerrymandering proved far more elusive. In Davis v. Bandemer (1986), six justices agreed that partisan gerrymandering claims are justiciable under the Equal Protection Clause. The case involved Indiana Democrats who won 51.9% of the statewide House vote in 1982 but only 43 of 100 seats.18Justia. Davis v. Bandemer, 478 U.S. 109 The Court could not agree on a workable test, and the Indiana plan survived.19Constitution Annotated, Congress.gov. Partisan Gerrymandering – Political Question Doctrine
In Vieth v. Jubelirer (2004), a plurality of four justices voted to shut the door, arguing no judicially manageable standard existed. Justice Anthony Kennedy concurred only in the result, suggesting a viable standard might eventually emerge.17NCSL. Redistricting and the Supreme Court: The Most Significant Cases
That possibility ended in Rucho v. Common Cause (2019). In a 5–4 decision written by Chief Justice John Roberts, the Court held that partisan gerrymandering claims are non-justiciable “political questions beyond the reach of the federal courts.” The majority reasoned that the Constitution does not mandate proportional representation and provides no “limited and precise” standard for how much partisan influence is too much.20Supreme Court of the United States. Rucho v. Common Cause, 588 U.S. 684 Roberts acknowledged that partisan gerrymandering is “distasteful” but pointed reformers toward state courts, state constitutional amendments, independent commissions, and congressional legislation. In Moore v. Harper (2023), the Court confirmed that state courts retain the power to hear such claims under their own constitutions.
How Technology Changed the Practice
If the federal legal guardrails were coming down, the tools for exploiting that freedom were becoming vastly more powerful. In the 1980s, Illinois mapmakers using bank mainframes could produce about 10 map possibilities over a four-month session. By the 1990s, personal computers brought that to around 100. By the 2000s, 1,000. By the 2010 cycle, 10,000.21The Guardian. How Technology Supercharged Gerrymandering Today, algorithms generate and evaluate thousands of maps almost instantly, optimizing for partisan advantage while meeting neutral criteria like compactness or VRA compliance.
Those tools converged with a coordinated strategy. In 2010, the Republican State Leadership Committee launched the Redistricting Majority Project, known as REDMAP, a $30 million effort to win control of state legislatures in the census year.22WBUR. Gerrymandering, Republicans, and REDMAP It was amplified by the Supreme Court’s Citizens United ruling in January 2010, which allowed unlimited independent political expenditures. Republicans gained nearly 700 state legislative seats and flipped 20 chambers. The maps drawn afterward locked in those advantages for a decade. In Pennsylvania’s 2012 congressional elections, Democratic candidates won more total votes statewide, yet Republicans took 13 of the state’s 18 House seats.23The New Yorker. The Influence of Redistricting
Where Things Stand Now
The post-Rucho era has pushed reform into the channels the Court itself identified. Arizona established an independent redistricting commission by ballot initiative in 2000, Michigan voters approved a 13-member commission in 2018, and Colorado, Missouri, and Utah also approved reform measures that year.24Campaign Legal Center. Independent Redistricting Commissions Results have been mixed. In 2024, Ohio voters rejected Issue 1, leaving elected officials in charge of map-making.25Ohio Capital Journal. Ohio Voters Reject Issue 1 At the federal level, the Freedom to Vote Act, which would have banned partisan gerrymandering and prohibited mid-decade redistricting, passed the House in 2022 but died in the Senate two votes short of overcoming a filibuster.26Brennan Center for Justice. Gerrymandering Explained
The 2020 cycle also brought a phenomenon that had been rare in modern times: mid-decade redraws. In 2025, at the urging of President Donald Trump, the Republican-controlled Texas legislature passed a mid-cycle plan to create five additional Republican-leaning congressional seats. Governor Greg Abbott signed the map on August 29, 2025. A three-judge federal court struck it down, but the Supreme Court intervened on December 4, 2025, staying that ruling and allowing the map to be used.27Cornell Law Institute. Abbott v. League of United Latin American Citizens, No. 25A608 California responded in kind. Voters approved Proposition 50 in a November 2025 special election by roughly two to one, suspending the state’s independent commission and authorizing a new map intended to flip five seats toward Democrats. On February 4, 2026, the Supreme Court declined to block it.28Roll Call. Supreme Court Refuses to Overturn New California Districts
Then, on April 29, 2026, the Supreme Court issued what may be the most consequential redistricting ruling since Rucho. In Louisiana v. Callais, a 6–3 majority written by Justice Samuel Alito struck down a Louisiana congressional map that had created a second majority-Black district, holding that the state lacked a compelling interest in using race because plaintiffs had not proven a Section 2 violation under Gingles. The ruling narrowed Section 2 itself, holding that the statute imposes liability only when there is evidence of “intentional racial discrimination.”29Supreme Court of the United States. Louisiana v. Callais, No. 24-109 Justice Elena Kagan, dissenting with Justices Sotomayor and Jackson, wrote that the majority had “eviscerate[d]” the Voting Rights Act.30SCOTUSblog. Supreme Court Strikes Down Redistricting Map in Major Voting Rights Act Case Within an hour of the ruling, Florida lawmakers approved a new congressional map creating four additional Republican seats; Alabama and Tennessee called special sessions to redraw districts.31Brookings Institution. Callais Decision Threatens to Stall Diversity Gains in House As of mid-2026, more than a quarter of all congressional seats have been redrawn mid-decade.32Harvard Kennedy School. Explainer: What’s Happening with Gerrymandering in the United States
From Patrick Henry’s eight-county trap for Madison in 1788 to Gerry’s reluctant signature in 1812 to algorithm-optimized maps and mid-decade redraws today, gerrymandering has grown steadily more sophisticated and more contested. The tools change, the legal landscape shifts, the battles move between federal and state courts. The underlying incentive stays the same: if you draw the lines, you pick your voters.