a weak prior

n. a starting belief held loosely enough for the data to move it

Election Atlas · ecological inference

Hispanic voters moved 22 points right in 2024.

The Election Atlas estimates how each demographic group voted, from the whole country down to single Census block groups, using certified returns, Census data and post-election surveys.

Elections
1,073
President, Senate and House, 2008–2024
Block groups
238,401
in 3,143 counties, all 50 states and DC
Groups
8
by race, ethnicity and education

Presidential margin by group, 2020 to 2024

Hispanic D+8 from D+30
Black D+65 from D+79
Asian D+19 from D+31
Multiracial D+5 from D+16
White, no degree R+30 from R+27
White, college D+9 from D+10
All voters R+2 from D+4
2020 2024 Democratic minus Republican share of each group's vote. Model estimates, not observed individual votes.
Open the atlas

Margin, vote shift and turnout for every group, county and block group.

Block-group map of the New York City area coloured by estimated presidential margin

Also here

Block-group map along Ocean Parkway in Brooklyn of the 2025 mayoral general election, Mamdani against Cuomo

NYC Mayoral Atlas

Explore mayoral candidates by demographic group and ranked-choice round.

Spades AI

Partnership Spades in the browser. Bid with your partner and play against AI opponents.

Archive · 2026 elections

2026 Midterm Simulator

Archived A joint model of every House, Senate and governor race, fitted to Kalshi and Polymarket order books.

State house districts across Michigan, Ohio and Pennsylvania colored by 2026 forecast margin

State Legislatures 2026

Archived Control odds for every chamber that was up in 2026, with district maps and a scenario picker.