Fylom
Back to Politics & power
Gerrymandering: how district lines decide elections

Politics & power

Gerrymandering: how district lines decide elections

12 min

Before a single vote is cast, the way electoral maps are drawn can lock in outcomes for a decade. Explore how gerrymandering works, the math used to detect it, and the fight over who should draw the lines.

Listen on the app, request early access:

Show notes

Packing concentrates opposition voters into single districts to neutralize their surplus voting power.

Cracking dilutes opposition voters across multiple districts to prevent them from reaching a majority.

The efficiency gap measures partisan bias by calculating the difference in wasted votes between parties.

Mathematical sampling of twenty-four thousand alternative maps can prove if a district plan is an outlier.

The Massachusetts Paradox shows how geographic sorting can leave one-third of voters with zero representation.

Proportional ranked choice voting in multi-member districts reduces the incentive for partisan map manipulation.

In this episode

  1. 1Intro1 min
  2. 2The Mechanics of Cracking and Packing2 min
  3. 3The Random Walk: Math as a Yardstick3 min
  4. 4The Massachusetts Paradox and Racial Gerrymandering3 min
  5. 5Beyond the Lines: Structural Solutions2 min
  6. 6Outro1 min

Sources

Fylom generates episodes like this on any topic you're curious about.

Fylom episodes are researched and written by AI. Automated checks help catch inaccuracies, but episodes aren't reviewed by a human and AI can still get things wrong. Treat them as a starting point, not a source of record — more in our accuracy disclaimer.

Gerrymandering: how district lines decide elections — Fylom