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

Lake Research Partners

Method: live phone mix · scored polls from 2002 to 2024 · 98% of scored polls were for a party or campaign

Versus the field
+0.20
points of error vs. other pollsters in the same races, after shrinkage (unshrunk +1.79; 14% own record)
Average miss
8.1
points on the margin, as published
House effect
D+0.4
lean relative to other polls of the same races
Scored polls
42
39 races · 10 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
2002412.1+2.6D+12.3
200444.9+0.3R+0.8
200655.00.2R+4.0
2008210.7+5.2D+3.1
201028.9+1.1D+12.9
201283.33.3D+1.2
2013115.2+0.8R+2.2
201436.1+2.7R+0.8
201629.7+0.9R+0.8
201855.6+1.2D+1.9
202036.4+0.2R+9.8
2022130.5+14.3D+11.1
2024225.2+16.7D+11.9
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Sep 3, 2026NC-9Richard Ojeda v. Richard HudsonR+4
Aug 23, 2026KY-6Zach Dembo v. Ralph AlvaradoD+1
Jul 14, 2026CA-48Marni von Wilpert v. Jim DesmondD+2
Jun 23, 2026PA-8Paige Cognetti v. Rob Bresnahan Jr.D+2
Apr 29, 2026Governor NELynne Walz v. Jim PillenR+2
Dec 17, 2025Governor NELynne Walz v. Jim PillenR+5
Dec 17, 2025Senate NEDan Osborn v. Pete RickettsR+1
Jul 29, 2025Governor NELynne Walz v. Jim PillenR+12
Jul 29, 2025Senate NEDan Osborn v. Pete RickettsD+1
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 26, 20242024 Senate, NDD-ALIGNEDR+9R+32.9D+23.9D+9.4
Sep 26, 20242024 President, NDD-ALIGNEDR+10R+36.4D+26.4D+9.4
Sep 11, 20222022 Senate, SDD-ALIGNEDR+13R+43.5D+30.5D+15.5
Nov 3, 20202020 PresidentD-ALIGNEDD+3D+4.4R+1.4D+4.5
Oct 14, 20202020 House, CA-4D-ALIGNEDR+4R+11.9D+7.9
Oct 4, 20202020 House, CA-1D-ALIGNEDR+4R+14.0D+10.0
Oct 16, 20182018 House, AK-1D-ALIGNEDR+4R+6.6D+2.6D+1.1
Oct 15, 20182018 House, MI-2D-ALIGNEDR+6R+12.3D+6.3
Oct 11, 20182018 House, WA-3D-ALIGNEDD+2R+5.3D+7.3R+1.6
Sep 26, 20182018 House, AZ-8D-ALIGNEDR+4R+10.9D+6.9
Apr 16, 20182018 House, AZ-8D-ALIGNEDEvenR+4.7D+4.7R+2.4
Oct 12, 20162016 President, AKD-ALIGNEDR+1R+14.7D+13.7D+11.6
Sep 30, 20162016 House, IA-1D-ALIGNEDR+2R+7.7D+5.7D+1.7
Sep 28, 20142014 Senate, MID-ALIGNEDD+9D+13.3R+4.3R+6.0
Sep 28, 20142014 Governor, MID-ALIGNEDR+1R+4.1D+3.1D+1.6
Sep 16, 20142014 House, KY-6D-ALIGNEDR+9R+20.0D+11.0D+4.9
Mar 26, 20132013 House, SC-1D-ALIGNEDD+3R+12.2D+15.2D+13.4
Oct 26, 20122012 President, NHD-ALIGNEDD+5D+5.6R+0.6R+3.3
Oct 22, 20122012 President, OHD-ALIGNEDD+2D+3.0R+1.0Even
Oct 21, 20122012 House, CA-36D-ALIGNEDD+6D+5.9D+0.1R+14.9
Oct 20, 20122012 President, NHD-ALIGNEDD+3D+5.6R+2.6R+3.3
Oct 16, 20122012 House, NY-24D-ALIGNEDD+2D+9.3R+7.3R+7.3
Oct 3, 20122012 House, CA-36D-ALIGNEDD+3D+5.9R+2.9R+14.9
Sep 10, 20122012 House, NC-9D-ALIGNEDR+1R+6.1D+5.1
May 26, 20122012 Governor, WID-ALIGNEDEvenR+6.8D+6.8D+0.4
Oct 13, 20102010 House, AZ-1D-ALIGNEDD+3R+6.0D+9.0R+7.5
Sep 23, 20102010 House, CA-11D-ALIGNEDD+10D+1.1D+8.9R+8.2
Oct 14, 20082008 House, FL-18D-ALIGNEDR+7R+15.7D+8.7D+2.7
Oct 13, 20082008 House, WA-8D-ALIGNEDD+7R+5.6D+12.6D+4.6
Oct 22, 20062006 Senate, MID-ALIGNEDD+18D+15.7D+2.3R+1.1
Sep 30, 20062006 House, CA-11R+1D+6.5R+7.5R+6.5
Sep 25, 20062006 House, ID-1D-ALIGNEDR+6R+5.2R+0.8D+3.9
May 14, 20062006 House, CA-50D-ALIGNEDD+7R+4.6D+11.6D+8.0
Apr 19, 20062006 House, CA-50D-ALIGNEDR+2R+4.6D+2.6D+8.0
Oct 4, 20042004 President, WID-ALIGNEDD+4D+0.4D+3.6R+3.1
Sep 22, 20042004 President, NHD-ALIGNEDEvenD+1.4R+1.4D+1.5
Sep 21, 20042004 President, OHD-ALIGNEDEvenR+2.1D+2.1D+2.2
Sep 16, 20042004 President, NCD-ALIGNEDEvenR+12.4D+12.4D+3.7
Sep 30, 20022002 House, CO-4D-ALIGNEDR+5R+13.3D+8.3R+3.7
Sep 23, 20022002 Senate, MED-ALIGNEDR+9R+16.9D+7.9R+10.4
Sep 17, 20022002 House, NH-1D-ALIGNEDD+2R+19.6D+21.6D+9.7
Sep 9, 20022002 Senate, ALD-ALIGNEDR+8R+18.7D+10.7R+12.0