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

Tulchin Research

Method: live phone · scored polls from 2010 to 2024 · 87% of scored polls were for a party or campaign

Versus the field
−0.11
points of error vs. other pollsters in the same races, after shrinkage (unshrunk −1.93; 6% own record). A thin record: too few scored polls to say much.
Average miss
4.1
points on the margin, as published
House effect
D+0.2
lean relative to other polls of the same races
Scored polls
15
13 races · 12 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
201023.43.4D+3.3
201644.52.2D+4.7
201863.12.8D+0.7
2020113.9+6.4D+6.0
202211.74.5
202411.81.4R+2.2
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Sep 13, 2026FL-27Eliott Rodriguez v. María Elvira SalazarR+1
Aug 31, 2026AL-2Shomari Figures v. Rhett MarquesEven
Aug 31, 2026FL-22Pia Dandiya v. Casey AskarD+2
Aug 4, 2026Governor OHAmy Acton v. Vivek RamaswamyD+2
Aug 4, 2026Senate OHSherrod Brown v. Jon HustedD+4
Aug 2, 2026NC-3Raymond Smith Jr. v. Greg MurphyR+3
Jul 16, 2026ME-2Matt Dunlap v. Paul LePageD+1
Jul 13, 2026VA-2Elaine G. Luria v. Jen KiggansEven
Jun 21, 2026CA-22Randy Villegas v. David G. ValadaoD+4
Jun 4, 2026Governor OHAmy Acton v. Vivek RamaswamyD+3
Jun 4, 2026Senate MIAbdul El-Sayed v. Mike RogersD+5
Jun 4, 2026Senate OHSherrod Brown v. Jon HustedD+4
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 19, 20242024 House, CA-45D-ALIGNEDD+2D+0.2D+1.8D+0.1
Oct 3, 20222022 House, CA-41D-ALIGNEDR+3R+4.7D+1.7
Oct 6, 20202020 House, IL-13D-ALIGNEDD+5R+8.9D+13.9D+4.0
Oct 28, 20182018 House, NY-27D-ALIGNEDD+4D+4.8R+0.8R+9.7
Oct 14, 20182018 Senate, TXD-ALIGNEDR+4R+2.6R+1.4R+2.7
Oct 8, 20182018 House, NY-27D-ALIGNEDEvenD+4.8R+4.8R+9.7
Oct 2, 20182018 House, CA-39D-ALIGNEDD+1D+3.1R+2.1R+5.1
Oct 1, 20182018 House, CA-50D-ALIGNEDR+1R+3.4D+2.7R+2.6
Sep 26, 20182018 Governor, VTD-ALIGNEDR+8R+14.9D+6.9D+2.9
Oct 16, 20162016 House, CA-25D-ALIGNEDR+2R+6.3D+4.3
Oct 11, 20162016 House, CA-7D-ALIGNEDD+11D+2.3D+8.7R+3.4
Sep 29, 20162016 House, CA-49D-ALIGNEDD+4R+0.5D+4.5R+5.0
Sep 12, 20162016 House, CA-7D-ALIGNEDD+3D+2.3D+0.7R+3.4
Oct 26, 20102010 Governor, CAD+8D+12.9R+4.9R+7.9
Oct 26, 20102010 Senate, CAD+8D+10.0R+2.0R+5.6