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

Tarrance Group

Method: live phone · scored polls from 1998 to 2024 · 95% of scored polls were for a party or campaign

Versus the field
−0.14
points of error vs. other pollsters in the same races, after shrinkage (unshrunk −0.66; 23% own record)
Average miss
6.3
points on the margin, as published
House effect
R+0.1
lean relative to other polls of the same races
Scored polls
81
66 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
199823.10.3Even
200035.2+0.5R+5.2
2002103.61.5D+1.7
200435.5+0.9R+2.4
2006113.5+12.3R+12.5
2008715.2+8.7R+3.2
2010165.92.9Even
201258.6+2.1R+0.3
2014107.70.3R+1.2
201655.5+0.1R+1.4
201857.0+2.2R+1.5
202061.94.8R+0.4
202233.30.8D+2.0
202454.30.9D+0.7
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Jul 30, 2026Governor AZKatie Hobbs v. Andy BiggsD+4
Jul 29, 2026Governor NVAaron Ford v. Joe LombardoR+7
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 29, 20242024 Senate, MIR-ALIGNEDR+2D+0.3R+2.3D+4.2
Oct 8, 20242024 President, FLR-ALIGNEDR+7R+13.1D+6.1D+7.2
Sep 19, 20242024 Senate, NVD+7D+1.6D+5.4D+5.9
Sep 19, 20242024 President, NVD+3R+3.1D+6.1D+3.6
Sep 18, 20242024 Senate, MIR-ALIGNEDD+2D+0.3D+1.7D+4.2
Oct 19, 20222022 Governor, IAR-ALIGNEDR+17R+18.5D+1.5D+3.0
Oct 19, 20222022 Senate, IAR-ALIGNEDR+11R+12.2D+1.2D+3.6
Oct 13, 20222022 House, NY-25R-ALIGNEDD+4D+11.3R+7.3
Oct 26, 20202020 Senate, MIR-ALIGNEDD+1D+1.7R+0.4D+5.5
Oct 15, 20202020 House, PA-10R-ALIGNEDR+4R+6.6D+2.6D+7.5
Oct 12, 20202020 House, IL-17R-ALIGNEDD+5D+4.1D+0.9D+6.2
Oct 5, 20202020 Senate, MIR-ALIGNEDD+2D+1.7D+0.3D+5.5
Sep 29, 20202020 House, NM-2R-ALIGNEDR+1R+7.4D+6.4D+5.0
Sep 3, 20202020 Senate, MIR-ALIGNEDD+1D+1.7R+0.7D+5.5
Oct 22, 20182018 Senate, MIR-ALIGNEDD+7D+6.5D+0.5D+6.5
Oct 2, 20182018 House, NM-2R-ALIGNEDR+4D+1.9R+5.9R+3.9
Sep 25, 20182018 Senate, WVR-ALIGNEDD+4D+3.3D+0.7D+3.2
Sep 25, 20182018 House, TX-31R-ALIGNEDR+21R+2.9R+18.1R+8.4
Sep 13, 20182018 House, CO-6R-ALIGNEDD+2D+11.2R+9.7R+2.9
Oct 14, 20162016 President, VAD+9D+5.3D+3.7D+0.9
Oct 12, 20162016 House, NV-3R-ALIGNEDR+5D+1.3R+6.3R+0.2
Sep 28, 20162016 House, NV-3R-ALIGNEDR+5D+1.3R+6.3R+0.2
Sep 21, 20162016 House, IA-3R-ALIGNEDR+15R+13.7R+1.3D+6.5
Sep 18, 20162016 House, CA-24R-ALIGNEDR+3D+6.8R+9.8
Oct 22, 20142014 Governor, HIR-ALIGNEDD+3D+12.4R+9.4R+3.4
Oct 19, 20142014 House, KS-2R-ALIGNEDR+12R+18.4D+6.4D+7.0
Oct 16, 20142014 Governor, HIR-ALIGNEDD+2D+12.4R+10.4R+3.4
Oct 15, 20142014 Governor, AZR-ALIGNEDR+7R+11.8D+4.8D+7.3
Oct 13, 20142014 House, MN-7R-ALIGNEDR+1D+8.6R+9.6D+6.0
Oct 8, 20142014 House, IA-3R-ALIGNEDR+2R+10.5D+8.5D+8.9
Sep 24, 20142014 House, VA-10R-ALIGNEDR+12R+16.1D+4.1D+7.1
Sep 24, 20142014 House, MA-6R-ALIGNEDR+1D+13.8R+14.8R+9.6
Sep 22, 20142014 House, MN-7R-ALIGNEDD+5D+8.6R+3.5D+6.0
Sep 16, 20142014 Governor, AZR-ALIGNEDR+6R+11.8D+5.8D+7.3
Oct 17, 20122012 House, CA-52R-ALIGNEDR+4D+2.4R+6.4R+5.4
Oct 10, 20122012 House, NV-4R-ALIGNEDR+10D+8.0R+18.0R+12.0
Oct 8, 20122012 Senate, AZR-ALIGNEDR+6R+3.0R+3.0D+0.9
Oct 1, 20122012 House, CA-9R-ALIGNEDR+1D+11.1R+12.1R+6.0
Sep 17, 20122012 House, PA-4R-ALIGNEDR+22R+25.3D+3.3
Oct 19, 20102010 House, NM-2R-ALIGNEDR+9R+10.8D+1.8D+6.0
Oct 18, 20102010 House, MS-4R-ALIGNEDR+2R+5.1D+3.1
Oct 18, 20102010 House, TN-8R-ALIGNEDR+15R+20.2D+5.2D+10.2
Oct 18, 20102010 Senate, CAR-ALIGNEDEvenD+10.0R+10.0R+5.3
Oct 18, 20102010 House, IA-2R-ALIGNEDR+1D+5.1R+6.1
Oct 17, 20102010 Governor, CAR-ALIGNEDEvenD+12.9R+12.9R+7.6
Oct 11, 20102010 House, TN-8R-ALIGNEDR+11R+20.2D+9.2D+10.2
Oct 6, 20102010 House, PA-10R-ALIGNEDR+5R+10.4D+5.4D+10.8
Oct 4, 20102010 House, KY-6R-ALIGNEDR+1D+0.3R+1.3D+9.8
Oct 4, 20102010 House, MS-1R-ALIGNEDR+11R+14.5D+3.5D+9.5
Oct 3, 20102010 House, IL-14R-ALIGNEDR+6R+6.3D+0.3D+4.3
Sep 24, 20102010 House, IL-17R-ALIGNEDR+1R+9.6D+8.6D+3.4
Sep 21, 20102010 House, MS-4R-ALIGNEDD+4R+5.1D+9.1
Sep 20, 20102010 House, KY-6R-ALIGNEDD+7D+0.3D+6.7D+9.8
Sep 13, 20102010 House, MS-1R-ALIGNEDR+7R+14.5D+7.5D+9.5
Sep 13, 20102010 House, IA-2R-ALIGNEDD+1D+5.1R+4.1
Oct 22, 20082008 House, IA-4R-ALIGNEDR+22R+21.1R+0.9
Oct 15, 20082008 House, FL-16R-ALIGNEDR+26R+20.2R+5.8
Oct 12, 20082008 House, CA-50R-ALIGNEDR+13R+5.1R+7.9R+0.8
Oct 9, 20082008 House, FL-16R-ALIGNEDD+25R+20.2D+45.2
Oct 5, 20082008 House, OH-7R-ALIGNEDR+24R+16.4R+7.6