Every decade, after the census, American politicians engage in a ritual that shapes democracy more profoundly than any campaign speech or policy debate: they draw lines on maps. These lines determine which voters belong to which districts, and in the hands of skilled practitioners, they can transform a state's political composition with surgical precision. The practice is called gerrymandering, and while voters technically choose their representatives, gerrymandering often means representatives have already chosen their voters.
The term dates to 1812, when Massachusetts Governor Elbridge Gerry approved a district so contorted it resembled a salamander. A newspaper cartoonist dubbed it a "Gerry-mander," and the portmanteau stuck. But the underlying strategy—manipulating boundaries to dilute opponents' voting power—predates the name by centuries and persists across democracies worldwide.
The two techniques that make it work
Gerrymandering relies on two complementary tactics: packing and cracking. Packing concentrates opposition voters into as few districts as possible, ensuring they win those seats by overwhelming margins while wasting their numerical advantage elsewhere. Cracking does the opposite, dispersing opposition voters across multiple districts so they never form a majority anywhere. A skilled mapmaker combines both, creating a few "sacrifice" districts where the other party wins handily while securing comfortable margins in the remaining seats.
Consider a hypothetical state with one million voters split evenly between two parties. With ten districts of 100,000 voters each, fair maps might yield five seats per party. But a clever cartographer could pack 400,000 opposition voters into four districts (winning each by 100,000-0) while cracking the remaining 100,000 across six districts. The result: a 6-4 advantage for the party drawing the maps, despite equal statewide support.
Why courts struggle to stop it
American courts have intervened against racial gerrymandering, which violates the Voting Rights Act and constitutional equal protection guarantees. But partisan gerrymandering occupies murkier legal terrain. The U.S. Supreme Court ruled in 2019 that federal courts cannot adjudicate partisan gerrymandering claims, deeming them "political questions" beyond judicial competence. This effectively returned the issue to state courts and legislatures—the very bodies that benefit from the practice.
Some states have responded by establishing independent redistricting commissions, removing mapmaking from partisan legislators. Others have adopted mathematical standards measuring district compactness or partisan fairness. Yet these reforms remain patchwork, and the fundamental tension endures: those in power rarely volunteer to relinquish the tools that keep them there.
The global dimension
Gerrymandering is not uniquely American. Northern Ireland's electoral boundaries were historically drawn to maintain Protestant political dominance. Singapore's Group Representation Constituencies have faced similar accusations. France periodically redraws its legislative map under executive authority, inviting manipulation. The difference in America is the decentralized, explicitly partisan nature of the process—in most states, the party controlling the legislature controls the maps.
Our take
Gerrymandering is democracy's original sin of self-dealing, and no amount of sophisticated mapping software or efficiency-gap metrics will solve a problem that is fundamentally about power protecting itself. The only durable remedy is removing redistricting from those who benefit from it—through independent commissions, algorithmic constraints, or constitutional amendments. Until then, the most consequential election in any state may not be the one voters see on their ballots, but the one that determined who got to draw the lines in the first place.
