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

Global Strategy Group

Method: live phone mix · scored polls from 2002 to 2025 · 98% of scored polls were for a party or campaign

Versus the field
−0.23
points of error vs. other pollsters in the same races, after shrinkage (unshrunk −0.65; 31% own record)
Average miss
5.7
points on the margin, as published
House effect
R+0.2
lean relative to other polls of the same races
Scored polls
107
89 races · 20 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
200212.34.4
2004137.7+2.3R+0.2
200644.21.9R+0.3
200834.90.8R+7.3
2010136.10.5D+1.5
2011210.7+4.5R+0.3
2012154.02.4D+1.4
2014116.80.4R+0.4
2016116.8+0.3R+0.4
2018114.80.4D+0.4
2020106.31.6R+1.7
202114.9+0.7D+1.5
202283.62.2R+1.7
202434.21.4R+4.3
202517.42.6R+1.9
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Sep 3, 2026NE-1Chris Backemeyer v. Mike FloodD+3
Aug 31, 2026Senate IAJosh Turek v. Ashley HinsonD+4
Aug 27, 2026Senate KYCharles Booker v. Andy BarrR+9
Aug 16, 2026Governor KSCindy Holscher v. Ty MastersonD+1
Aug 16, 2026Senate KSAdam Hamilton v. Roger MarshallD+1
Aug 13, 2026MI-10Christina Hines v. Mike BouchardEven
Aug 13, 2026MI-7William Lawrence v. Tom BarrettD+2
Aug 9, 2026PA-1Bob Harvie v. Brian FitzpatrickR+4
Jul 26, 2026NY-18Pat Ryan v. Jacqueline AuringerD+14
Jul 23, 2026OH-10Kristina Knickerbocker v. Mike TurnerR+5
Jul 21, 2026CO-5Jessica Killin v. Jeff CrankR+1
Jul 19, 2026IA-2Lindsay James v. Joe MitchellD+1
Jun 11, 2026Senate IAJosh Turek v. Ashley HinsonD+2
May 11, 2026Governor NVAaron Ford v. Joe LombardoR+3
Apr 28, 2026Governor IARob Sand v. Zach LahnD+9
Mar 22, 2026PA-1Bob Harvie v. Brian FitzpatrickR+6
Feb 22, 2026Generic ballotD+8
Nov 3, 2025CO-5Jessica Killin v. Jeff CrankR+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
Sep 25, 20252025-GOV-NJ D-ALIGNEDD+7D+14.4R+7.4R+9.4
Oct 6, 20242024 House, CA-41D-ALIGNEDEvenR+3.4D+3.4D+6.2
Oct 3, 20242024 House, NJ-7D-ALIGNEDR+2R+5.4D+3.4D+1.5
Sep 13, 20242024 House, NE-2D-ALIGNEDD+4R+1.9D+5.9D+6.1
Oct 27, 20222022 House, NY-22D-ALIGNEDD+2D+6.1R+4.1R+6.6
Oct 16, 20222022 House, CO-8D-ALIGNEDR+2D+0.7R+2.7
Oct 11, 20222022 Governor, COD-ALIGNEDD+17D+19.4R+2.9R+3.9
Oct 11, 20222022 Senate, COD-ALIGNEDD+11D+14.6R+4.1R+4.7
Sep 26, 20222022 House, NM-2D-ALIGNEDD+2D+0.7D+1.3R+3.2
Sep 20, 20222022 Senate, NCD-ALIGNEDEvenR+3.2D+3.2D+0.4
Sep 19, 20222022 House, NY-22D-ALIGNEDD+1D+6.1R+5.1R+6.6
Sep 8, 20222022 House, OR-5D-ALIGNEDD+3R+2.1D+5.1
Sep 20, 20212021 Governor, VAD+3R+1.9D+4.9D+3.4
Oct 11, 20202020 House, NY-18D-ALIGNEDD+18D+12.6D+5.4
Oct 8, 20202020 House, VA-5D-ALIGNEDD+2R+5.1D+7.1D+4.2
Oct 4, 20202020 House, PA-1D-ALIGNEDR+2R+13.1D+11.1D+5.6
Oct 1, 20202020 House, VA-5D-ALIGNEDD+3R+5.1D+8.1D+4.2
Sep 27, 20202020 House, FL-16D-ALIGNEDR+6R+11.0D+5.0D+1.8
Sep 16, 20202020 President, Nebraska CD-2D-ALIGNEDD+6D+6.5R+0.5R+1.4
Sep 16, 20202020 House, NE-2D-ALIGNEDEvenR+4.6D+4.6D+3.2
Sep 15, 20202020 House, TX-3D-ALIGNEDR+1R+12.2D+11.2D+10.3
Sep 14, 20202020 House, VA-5D-ALIGNEDR+1R+5.1D+4.1D+4.2
Sep 10, 20202020 House, MI-3D-ALIGNEDEvenR+5.9D+5.9D+4.5
Oct 14, 20182018 House, MN-2D-ALIGNEDD+9D+5.5D+3.5R+1.8
Oct 12, 20182018 House, ME-2D-ALIGNEDD+6D+1.2D+4.8R+0.8
Oct 9, 20182018 House, VA-10D-ALIGNEDD+10D+12.4R+2.4R+4.8
Oct 7, 20182018 House, IL-12D-ALIGNEDR+1R+6.2D+5.2D+1.1
Sep 30, 20182018 House, FL-18D-ALIGNEDR+3R+8.6D+5.6D+0.7
Sep 23, 20182018 Senate, WVD-ALIGNEDD+12D+3.3D+8.7D+3.2
Sep 18, 20182018 House, CA-45D-ALIGNEDD+3D+4.1R+1.1R+2.3
Sep 17, 20182018 House, MN-2D-ALIGNEDD+8D+5.5D+2.5R+1.8
Sep 17, 20182018 House, NY-1D-ALIGNEDR+3D+1.0R+4.0R+11.1
Sep 16, 20182018 House, FL-18D-ALIGNEDR+6R+8.6D+2.6D+0.7
Sep 8, 20182018 House, WI-1D-ALIGNEDEvenR+12.3D+12.3D+6.8
Oct 17, 20162016 House, AZ-1D-ALIGNEDD+10D+7.3D+2.7R+0.4
Oct 15, 20162016 House, NV-3D-ALIGNEDD+7D+1.3D+5.7R+2.3
Oct 14, 20162016 Governor, WVD-ALIGNEDD+10D+6.8D+3.2R+1.5
Oct 14, 20162016 President, WVD-ALIGNEDR+27R+42.1D+15.1D+14.8
Oct 12, 20162016 House, KS-3D-ALIGNEDR+4R+10.7D+6.7D+2.8
Oct 3, 20162016 House, FL-10D-ALIGNEDD+38D+29.7D+8.3
Oct 1, 20162016 House, IN-9D-ALIGNEDR+2R+13.7D+11.7D+9.7
Sep 24, 20162016 House, AZ-1D-ALIGNEDD+7D+7.3R+0.3R+0.4
Sep 16, 20162016 House, NE-2D-ALIGNEDD+10R+1.2D+11.2D+2.1
Sep 8, 20162016 Senate, FLD-ALIGNEDR+2R+7.7D+5.7D+2.3
Sep 8, 20162016 President, FLD-ALIGNEDD+3R+1.2D+4.2D+3.4
Oct 22, 20142014 House, NY-18D-ALIGNEDD+6D+5.2D+0.8D+0.9
Oct 21, 20142014 House, NY-24D-ALIGNEDD+5R+10.4D+15.4D+13.4
Oct 20, 20142014 House, HI-1D-ALIGNEDD+7D+3.9D+3.1R+4.9
Oct 18, 20142014 House, NY-19D-ALIGNEDR+10R+19.8D+9.8R+3.0
Oct 13, 20142014 Governor, NVR+44R+46.7D+2.7D+18.7
Oct 5, 20142014 Governor, HID-ALIGNEDD+12D+12.4R+0.4R+3.7
Sep 17, 20142014 Senate, NCD-ALIGNEDD+4R+1.6D+5.6D+3.0
Sep 10, 20142014 Senate, NHD-ALIGNEDD+7D+3.2D+3.8R+0.7
Sep 8, 20142014 House, AR-2D-ALIGNEDD+3R+8.3D+11.3D+12.8
Sep 6, 20142014 Governor, ILD-ALIGNEDD+3R+3.9D+6.9D+4.6
Sep 6, 20142014 House, MN-7D-ALIGNEDD+24D+8.6D+15.4R+1.1
Oct 29, 20122012 Senate, IND-ALIGNEDD+9D+5.8D+3.2R+3.7
Oct 22, 20122012 House, NY-21D-ALIGNEDD+7D+5.0D+2.0R+0.8
Oct 19, 20122012 Senate, IND-ALIGNEDD+2D+5.8R+3.8R+3.7
Oct 15, 20122012 House, NH-1D-ALIGNEDD+3D+3.8R+0.8R+7.8