House Effects
Monday, September 21, 202643 days until Election Day, November 3, 2026
Pollster record · how records are scored

The Washington Post/George Mason University Schar School of Policy and Government

Method: live phone mix · scored polls from 2016 to 2025

Versus the field
−0.19
points of error vs. other pollsters in the same races, after shrinkage (unshrunk −1.05; 14% own record)
Average miss
2.8
points on the margin, as published
House effect
D+0.4
lean relative to other polls of the same races
Scored polls
24
17 races · 2 polls this cycle
By cycle

Record over time

Error relative to other pollsters in the same races (negative is better), and lean relative to them. Cycles with fewer than 10 scored polls are grayed: a handful of polls says little.

CyclePollsAvg. missVersus the fieldLean vs. field
201610.71.6R+0.4
201733.13.5D+5.4
201830.84.9D+5.7
202023.40.0D+1.0
202123.9+0.1D+0.5
2024113.00.1D+0.6
202523.43.9D+3.1
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Sep 14, 2026Governor MIJocelyn Benson v. John JamesD+12
Sep 14, 2026Senate MIAbdul El-Sayed v. Mike RogersD+3
The receipts

Most recent scored polls

Polls in the final two months of a race with a certified result. “Others” is the average miss of other pollsters in the same race.

Poll dateRacePollResultMissOthers' miss
Oct 20, 20252025-GOV-VA D+12D+15.4R+3.4R+6.5
Sep 29, 20252025-GOV-VA D+12D+15.4R+3.4R+6.5
Oct 23, 20242024 Senate, VAD+13D+8.9D+4.1D+1.0
Oct 23, 20242024 President, VAD+6D+5.8D+0.2D+1.3
Oct 15, 20242024 President, AZR+3R+5.5D+2.5D+4.8
Oct 15, 20242024 President, WID+3R+0.9D+3.9D+2.9
Oct 15, 20242024 President, PAD+2R+1.7D+3.7D+2.5
Oct 15, 20242024 President, NVEvenR+3.1D+3.1D+3.7
Oct 15, 20242024 President, NCR+3R+3.2D+0.2D+2.6
Oct 15, 20242024 President, MID+2R+1.4D+3.4D+3.7
Oct 15, 20242024 President, GAD+4R+2.2D+6.2D+1.4
Sep 8, 20242024 President, VAD+8D+5.8D+2.2D+1.3
Sep 8, 20242024 Senate, VAD+12D+8.9D+3.1D+1.0
Oct 26, 20212021 Governor, VAD+1R+1.9D+2.9D+3.4
Sep 13, 20212021 Governor, VAD+3R+1.9D+4.9D+3.4
Oct 19, 20202020 Senate, VAD+18D+12.1D+5.9D+3.1
Oct 19, 20202020 President, VAD+11D+10.1D+0.9D+1.8
Oct 28, 20182018 House, VA-10D+11D+12.4R+1.4R+6.0
Oct 21, 20182018 House, VA-10D+13D+12.4D+0.6R+6.0
Oct 5, 20182018 House, VA-10D+12D+12.4R+0.4R+6.0
Nov 29, 20172017 Senate, ALD+3D+1.6D+1.4R+3.1
Oct 28, 20172017 Governor, VAD+5D+8.9R+3.9R+5.9
Sep 30, 20172017 Governor, VAD+13D+8.9D+4.1R+5.9
Oct 29, 20162016 President, VAD+6D+5.3D+0.7D+1.1