The Proportional House — mapping the U.S. House under proportional representation.
As of 2026-10-03: under today's polling (D+9.2), a proportional U.S. House would be D 240 / R 195 (actual House today: D 215 / R 220). If polls miss by the historical ±2.2 points, the range is D 234–242. Control of the House would flip at R+0.6 on the generic ballot.
This interactive site requires JavaScript. The data is public:
projection.json, the
v1 API, and static per-state pages under /state/.