Arts & Culture
Understanding Gerrymandering: Techniques and Consequences for Representation
Quick fact
The term 'gerrymander' was coined in 1812 after Massachusetts Governor Elbridge Gerry approved a voting district that resembled a salamander. One party can win a majority of seats in a state even when it receives fewer than half of the total votes.
Why this is interesting
Did you know that the shape of your voting district might not be chosen to represent your community, but to control an election? Some districts look like a salamander—that's how this practice got its name.
Read the full explanation
Understanding Understanding Gerrymandering: Techniques and Consequences for Representation
Imagine you have a large pizza (the state) that you need to divide into slices (voting districts). Each slice elects one representative. If you control the knife, you can make slices that determine who wins. That's the core of gerrymandering: manipulating the boundaries of voting districts to favor a particular party or group. The two main techniques are 'cracking' and 'packing.' Cracking spreads an opponent's supporters across many districts so they are a minority in each, wasting their votes. Packing concentrates them into one district, so they win that district by a huge margin but lose the others. Both strategies waste votes, but in different ways. The result is that the party in power can win more districts than their share of the popular vote would normally give them.
A deeper explanation
The underlying mechanism of gerrymandering is the creation of 'wasted votes'—votes that don't contribute to a win. A vote is wasted if it is for the losing candidate, or if it is for the winning candidate but exceeds the number needed to win. A fair map would have each party waste about the same number of votes. An unfair map creates an 'efficiency gap': the difference in wasted votes between the two parties, divided by the total number of votes. This metric helps quantify how much a map is biased. Gerrymandering is possible because most districts follow the winner-take-all principle: one representative per district. The way boundaries are drawn can determine how many districts a party can win, even without changing the total number of votes. This directly affects representation, often leading to uncompetitive elections and a lack of incentive for elected officials to appeal to the other party. It can also dilute the influence of minority groups, who may be cracked or packed. Consequently, gerrymandering raises concerns about democratic legitimacy, and the U.S. Supreme Court has struggled to establish a clear standard for when it becomes unconstitutional. Some states have turned to independent commissions to draw districts, aiming for more fair and competitive elections.