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

Garin-Hart-Yang Research Group

Method: live phone mix · scored polls from 1998 to 2024 · 98% of scored polls were for a party or campaign

Versus the field
+0.12
points of error vs. other pollsters in the same races, after shrinkage (unshrunk +0.48; 32% own record)
Average miss
6.0
points on the margin, as published
House effect
R+0.2
lean relative to other polls of the same races
Scored polls
104
90 races · 13 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
1998312.2+2.3R+1.9
200012.51.6D+0.1
200124.4+0.5R+2.8
2002115.6+0.5R+0.2
200485.70.4D+3.8
200652.61.5R+0.8
200873.7+0.2R+1.8
2010510.2+4.8D+3.8
201295.70.3D+2.2
201475.61.7D+0.2
201676.21.2R+0.1
201710.45.2D+0.5
201867.1+1.4D+2.9
2020257.5+1.8R+1.5
202251.42.1R+3.4
202312.91.2R+2.0
202410.80.2R+4.4
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Sep 3, 2026TN-9Justin Pearson v. Brent TaylorR+4
Aug 27, 2026FL-13Leela Gray v. Anna Paulina LunaD+1
Aug 15, 2026Governor SCJermaine Johnson v. Alan WilsonR+7
Aug 13, 2026Governor FLDavid Jolly v. Byron DonaldsD+1
Aug 9, 2026OH-15Don Leonard v. Mike CareyR+4
Aug 4, 2026Senate MTAlani Bankhead v. Kurt AlmeR+30
Aug 1, 2026Senate METroy Jackson v. Susan CollinsD+4
Jun 25, 2026OH-15Don Leonard v. Mike CareyR+5
Jun 24, 2026Senate MTAlani Bankhead v. Kurt AlmeR+25
Feb 17, 2026Governor NVAaron Ford v. Joe LombardoR+3
Sep 22, 2025Governor OHAmy Acton v. Vivek RamaswamyD+1
Sep 22, 2025Senate OHSherrod Brown v. Jon HustedD+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 13, 20242024 House, NY-19D-ALIGNEDD+3D+2.2D+0.8D+1.3
Oct 16, 20232023 Governor, KYD-ALIGNEDD+8D+5.1D+2.9D+1.1
Oct 22, 20222022 Senate, NVD-ALIGNEDD+1D+0.8D+0.2R+0.5
Oct 21, 20222022 Senate, GAD-ALIGNEDD+3D+1.0D+2.0D+0.3
Oct 19, 20222022 Senate, PAD-ALIGNEDD+2D+4.9R+2.9R+2.5
Oct 15, 20222022 Senate, WID-ALIGNEDR+2R+1.0R+1.0R+1.7
Oct 13, 20222022 Senate, AZD-ALIGNEDD+4D+4.9R+0.9R+0.8
Oct 18, 20202020 House, OH-10D-ALIGNEDR+4R+16.7D+12.7
Oct 14, 20202020 President, GAD-ALIGNEDD+7D+0.2D+6.8D+0.6
Oct 14, 20202020 Senate, GAD-ALIGNEDD+5R+1.8D+6.8D+1.7
Oct 12, 20202020 House, VA-10D-ALIGNEDD+22D+13.1D+8.9
Oct 2, 20202020 Governor, MOD-ALIGNEDR+2R+16.4D+14.4D+9.1
Oct 2, 20202020 President, MOD-ALIGNEDR+2R+15.4D+13.4D+7.3
Sep 29, 20202020 House, OH-10D-ALIGNEDR+7R+16.7D+9.7
Sep 27, 20202020 President, TXD-ALIGNEDR+2R+5.6D+3.6D+3.0
Sep 27, 20202020 President, GAD-ALIGNEDD+3D+0.2D+2.8D+0.6
Sep 27, 20202020 President, NCD-ALIGNEDD+2R+1.3D+3.3D+2.9
Sep 27, 20202020 President, OHD-ALIGNEDR+2R+8.0D+6.0D+6.5
Sep 27, 20202020 President, IAD-ALIGNEDR+2R+8.2D+6.2D+7.6
Sep 27, 20202020 Senate, GAD-ALIGNEDR+3R+1.8R+1.2D+1.7
Sep 27, 20202020 Senate, IAD-ALIGNEDEvenR+6.6D+6.6D+7.9
Sep 27, 20202020 Senate, NCD-ALIGNEDD+13R+1.7D+14.7D+5.9
Sep 19, 20202020 President, FLD-ALIGNEDD+6R+3.4D+9.4D+5.4
Sep 19, 20202020 President, AZD-ALIGNEDD+11D+0.3D+10.7D+2.2
Sep 19, 20202020 President, PAD-ALIGNEDD+11D+1.2D+9.8D+4.0
Sep 19, 20202020 Senate, AZD-ALIGNEDD+12D+2.3D+9.7D+4.0
Sep 19, 20202020 President, MID-ALIGNEDD+5D+2.8D+2.2D+4.6
Sep 19, 20202020 Senate, MID-ALIGNEDD+8D+1.7D+6.3D+5.5
Sep 19, 20202020 President, WID-ALIGNEDD+7D+0.6D+6.4D+6.4
Sep 7, 20202020 Generic ballotD-ALIGNEDD+8D+3.0D+5.0D+4.0
Sep 7, 20202020 PresidentD-ALIGNEDD+8D+4.4D+3.6D+4.4
Sep 4, 20202020 House, TX-21D-ALIGNEDD+1R+6.6D+7.6D+5.5
Oct 2, 20182018 House, KY-6D-ALIGNEDD+7R+3.2D+10.2D+3.5
Oct 1, 20182018 House, IL-6D-ALIGNEDD+5D+7.2R+2.2R+7.0
Sep 25, 20182018 Senate, TND-ALIGNEDD+2R+10.8D+12.8D+6.8
Sep 20, 20182018 Governor, GAD-ALIGNEDD+6R+1.4D+7.4R+0.5
Sep 10, 20182018 House, IL-6D-ALIGNEDD+3D+7.2R+4.2R+7.0
Sep 8, 20182018 House, VA-2D-ALIGNEDD+8D+2.2D+5.8R+6.9
Apr 26, 20172017 House, MT-1D-ALIGNEDR+6R+5.6R+0.4R+4.9
Oct 17, 20162016 House, IN-9D-ALIGNEDEvenR+13.7D+13.7D+9.1
Oct 7, 20162016 House, KS-3D-ALIGNEDR+4R+10.7D+6.7D+2.8
Oct 1, 20162016 House, NJ-5D-ALIGNEDD+7D+4.4D+2.6R+2.3
Sep 29, 20162016 Senate, NVR+1D+2.4R+3.4R+3.6
Sep 29, 20162016 President, NVD+3D+2.4D+0.6R+1.6
Sep 15, 20162016 Governor, WVD-ALIGNEDD+13D+6.8D+6.2R+2.3
Sep 15, 20162016 President, WVD-ALIGNEDR+32R+42.1D+10.1D+15.8
Oct 26, 20142014 Senate, IAD-ALIGNEDEvenR+8.3D+8.3D+5.9
Oct 16, 20142014 House, MA-6D-ALIGNEDD+11D+13.8R+2.8R+10.2
Oct 14, 20142014 House, NJ-5D-ALIGNEDR+5R+12.1D+7.1D+4.1
Oct 9, 20142014 House, CT-5D-ALIGNEDD+16D+6.5D+9.5
Sep 26, 20142014 House, MA-6D-ALIGNEDD+10D+13.8R+3.8R+10.2
Sep 17, 20142014 House, CA-7D-ALIGNEDD+4D+0.8D+3.2
Sep 5, 20142014 Senate, NCD-ALIGNEDD+3R+1.6D+4.6D+3.1
Oct 28, 20122012 Senate, MTD-ALIGNEDD+1D+3.7R+2.7R+5.5
Oct 21, 20122012 House, CT-5D-ALIGNEDD+4D+3.1D+0.9R+5.7
Oct 17, 20122012 House, IL-11D-ALIGNEDD+4D+17.1R+13.1R+18.1
Oct 17, 20122012 Senate, VAD-ALIGNEDD+4D+5.9R+1.9R+3.7
Oct 16, 20122012 Senate, PAD-ALIGNEDD+13D+9.1D+3.9R+2.6
Sep 26, 20122012 House, FL-18D-ALIGNEDD+9D+0.6D+8.4R+4.7
Sep 19, 20122012 House, MI-1D-ALIGNEDD+9R+0.5D+9.5R+0.9