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

GBAO

Method: live phone mix · scored polls from 2010 to 2024 · 93% of scored polls were for a party or campaign

Versus the field
+0.04
points of error vs. other pollsters in the same races, after shrinkage (unshrunk +0.39; 21% own record)
Average miss
5.8
points on the margin, as published
House effect
R+0.1
lean relative to other polls of the same races
Scored polls
57
45 races · 21 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
2010120.3+12.3D+7.2
201284.31.8R+1.5
201435.71.5D+2.7
201695.40.1R+0.5
201715.60.9R+4.0
2018103.21.6Even
2020197.6+1.3D+0.4
202221.44.4R+2.1
202446.8+2.9R+0.3
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Sep 11, 2026NC-1Don Davis v. Laurie BuckhoutD+7
Sep 3, 2026NV-2Teresa Benitez-Thompson v. David FlippoD+1
Aug 24, 2026AZ-2Jonathan Nez v. Eli CraneR+2
Aug 10, 2026Senate MIAbdul El-Sayed v. Mike RogersD+6
Aug 9, 2026Governor TXGina Hinojosa v. Greg AbbottR+1
Aug 3, 2026Governor WIDavid Crowley v. Tom TiffanyD+3
Jul 20, 2026Generic ballotD+8
Jul 13, 2026Senate KSAdam Hamilton v. Roger MarshallR+4
Jul 2, 2026PA-7Bob Brooks v. Ryan E. MackenzieD+4
Jun 20, 2026OH-7Brian Poindexter v. Max MillerR+1
Jun 15, 2026AZ-2Jonathan Nez v. Eli CraneR+3
Jun 1, 2026MI-4Sean McCann v. Bill HuizengaD+3
Apr 15, 2026Generic ballotD+8
Mar 16, 2026Senate IAJosh Turek v. Ashley HinsonR+4
Feb 3, 2026Governor TXGina Hinojosa v. Greg AbbottR+3
Nov 26, 2025Generic ballotD+6
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 23, 20242024 Senate, TXD-ALIGNEDEvenR+8.5D+8.5D+4.5
Sep 22, 20242024 Governor, IND-ALIGNEDR+3R+13.3D+10.3D+4.0
Sep 18, 20242024 House, NY-17D-ALIGNEDR+3R+6.3D+3.8D+3.5
Sep 10, 20242024 House, WI-3D-ALIGNEDD+2R+2.7D+4.7D+0.7
Oct 13, 20222022 Governor, ORD-ALIGNEDD+2D+3.4R+1.4R+2.9
Oct 5, 20222022 House, OR-6D-ALIGNEDD+1D+2.4R+1.4R+3.5
Oct 27, 20202020 Senate, KSD-ALIGNEDD+1R+11.4D+11.9D+6.8
Oct 19, 20202020 PresidentD+13D+4.4D+8.6D+4.3
Oct 19, 20202020 Generic ballotD+12D+3.0D+9.0D+3.7
Oct 17, 20202020 Senate, NMD-ALIGNEDD+11D+6.1D+4.9D+2.9
Oct 17, 20202020 House, TX-6D-ALIGNEDR+4R+8.8D+4.8
Oct 17, 20202020 President, NMD-ALIGNEDD+13D+10.8D+2.2D+0.8
Oct 11, 20202020 House, TX-22D-ALIGNEDD+5R+6.9D+11.9
Oct 11, 20202020 House, TX-10D-ALIGNEDR+2R+7.1D+5.1
Oct 2, 20202020 House, PA-10D-ALIGNEDD+6R+6.6D+12.6D+6.8
Sep 28, 20202020 President, SCD-ALIGNEDR+5R+11.7D+6.7D+4.0
Sep 28, 20202020 Senate, SCD-ALIGNEDD+1R+10.3D+11.3D+7.3
Sep 27, 20202020 House, TX-22D-ALIGNEDD+3R+6.9D+9.9
Sep 27, 20202020 Senate, KSD-ALIGNEDD+2R+11.4D+13.4D+6.8
Sep 24, 20202020 House, TX-10D-ALIGNEDR+2R+7.1D+5.1
Sep 20, 20202020 House, IL-13D-ALIGNEDR+1R+8.9D+7.9D+10.0
Sep 16, 20202020 PresidentD+12D+4.4D+7.6D+4.3
Sep 16, 20202020 President, GAD-ALIGNEDD+3D+0.2D+2.8D+0.6
Sep 16, 20202020 Senate, GAD-ALIGNEDD+1R+1.8D+2.8D+1.7
Sep 16, 20202020 Generic ballotD+9D+3.0D+6.0D+3.7
Oct 22, 20182018 House, OH-12D-ALIGNEDEvenR+4.2D+4.2R+1.7
Oct 21, 20182018 Senate, TXD-ALIGNEDR+4R+2.6R+1.4R+2.7
Oct 10, 20182018 House, NY-1D-ALIGNEDR+3D+1.0R+4.3R+11.0
Oct 4, 20182018 House, IL-13D-ALIGNEDR+1R+0.8R+0.2R+6.3
Oct 1, 20182018 House, FL-26D-ALIGNEDD+2D+1.7D+0.3R+3.8
Sep 23, 20182018 House, TX-32D-ALIGNEDD+2D+6.5R+4.5R+5.4
Sep 23, 20182018 House, CA-45D-ALIGNEDD+1D+4.1R+3.1R+1.8
Sep 13, 20182018 House, OH-1D-ALIGNEDD+2R+4.4D+6.4R+1.9
Sep 11, 20182018 House, IL-13D-ALIGNEDR+5R+0.8R+4.2R+6.3
Sep 6, 20182018 House, OH-12D-ALIGNEDR+1R+4.2D+3.2R+1.7
Apr 30, 20172017 House, GA-6D-ALIGNEDD+2R+3.6D+5.6D+5.7
Oct 28, 20162016 House, MN-2D-ALIGNEDD+5R+1.8D+6.8D+4.7
Oct 16, 20162016 House, PA-16D-ALIGNEDR+3R+10.9D+7.9
Oct 16, 20162016 House, IA-1D-ALIGNEDD+1R+7.7D+8.7D+0.9
Oct 15, 20162016 House, NV-4D-ALIGNEDD+2D+4.0R+2.0
Oct 5, 20162016 House, MN-2D-ALIGNEDD+4R+1.8D+5.8D+4.7
Sep 26, 20162016 Senate, NHD-ALIGNEDD+3D+0.1D+2.9R+0.4
Sep 26, 20162016 President, NHD-ALIGNEDD+6D+0.4D+5.6D+4.2
Sep 21, 20162016 House, MN-2D-ALIGNEDD+2R+1.8D+3.8D+4.7
Sep 20, 20162016 House, NY-3D-ALIGNEDD+17D+11.7D+5.3R+4.0
Sep 20, 20142014 House, CA-10D-ALIGNEDR+8R+12.3D+4.3
Sep 16, 20142014 House, NY-11D-ALIGNEDEvenR+6.2D+6.2R+5.3
Sep 9, 20142014 House, NJ-3D-ALIGNEDR+3R+9.6D+6.6D+5.0
Oct 28, 20122012 Senate, NMD-ALIGNEDD+10D+5.7D+4.3D+3.5
Oct 17, 20122012 House, NY-25D-ALIGNEDD+10D+18.4R+8.4R+10.1
Oct 17, 20122012 House, IL-17D-ALIGNEDD+4D+6.6R+2.6R+9.2
Oct 6, 20122012 Senate, NMD-ALIGNEDD+12D+5.7D+6.3D+3.5
Sep 25, 20122012 House, IL-17D-ALIGNEDR+2D+6.6R+8.6R+9.2
Sep 25, 20122012 Senate, NMD-ALIGNEDD+8D+5.7D+2.3D+3.5
Sep 10, 20122012 House, FL-26D-ALIGNEDD+9D+10.6R+1.6R+6.2
Sep 9, 20122012 House, AZ-9D-ALIGNEDD+4D+4.1R+0.1R+3.0
Sep 8, 20102010 House, KS-4D-ALIGNEDR+2R+22.3D+20.3D+9.3