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

EMC Research

Method: text/web mix · scored polls from 2000 to 2020 · 88% of scored polls were for a party or campaign

Versus the field
+0.03
points of error vs. other pollsters in the same races, after shrinkage (unshrunk +1.65; 9% own record)
Average miss
7.7
points on the margin, as published
House effect
R+0.1
lean relative to other polls of the same races
Scored polls
32
24 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
200042.81.3R+1.3
2002311.1+4.3D+0.6
200445.1+0.8R+0.6
200678.2+3.8D+2.7
200837.1+1.8R+7.8
201057.1+1.7D+0.5
201216.53.1R+0.1
2014111.5+4.6
2020412.2+5.3R+1.2
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Feb 22, 2026Governor OHAmy Acton v. Vivek RamaswamyD+10
Feb 22, 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
Oct 18, 20202020 House, NC-11D-ALIGNEDD+3R+12.2D+15.2
Oct 2, 20202020 President, TXD-ALIGNEDEvenR+5.6D+5.6D+2.9
Sep 24, 20202020 House, NC-11D-ALIGNEDD+4R+12.2D+16.2
Sep 5, 20202020 House, TX-25D-ALIGNEDR+2R+13.8D+11.8
Oct 25, 20142014 House, MI-6D-ALIGNEDR+4R+15.5D+11.5
Oct 21, 20122012 Senate, CTD-ALIGNEDD+6D+12.5R+6.5R+10.3
Oct 3, 20102010 Governor, SCD-ALIGNEDR+5R+4.5R+0.5R+5.0
Sep 26, 20102010 Governor, FLD-ALIGNEDD+1R+1.1D+2.1D+2.1
Sep 26, 20102010 Governor, SCD-ALIGNEDR+10R+4.5R+5.5R+5.0
Sep 22, 20102010 House, FL-24D-ALIGNEDD+2R+19.3D+21.3D+7.7
Sep 10, 20102010 Senate, CTD-ALIGNEDD+15D+9.3D+5.7D+1.7
Oct 12, 20082008 President, FLD+4D+2.8D+1.2R+0.9
Oct 8, 20082008 House, FL-25D-ALIGNEDR+3R+6.1D+3.1D+0.6
Sep 13, 20082008 House, FL-24D-ALIGNEDR+1D+16.1R+17.1D+3.0
Oct 27, 20062006 Senate, TND-ALIGNEDD+6R+2.7D+8.7D+0.1
Oct 23, 20062006 Senate, TND-ALIGNEDD+2R+2.7D+4.7D+0.1
Oct 20, 20062006 House, FL-13D-ALIGNEDD+11R+0.2D+11.2D+1.9
Oct 3, 20062006 House, FL-13D-ALIGNEDD+12R+0.2D+12.2D+1.9
Oct 3, 20062006 Senate, TND-ALIGNEDD+7R+2.7D+9.7D+0.1
Sep 24, 20062006 House, KY-2D-ALIGNEDR+8R+10.8D+2.8D+5.3
Sep 10, 20062006 House, FL-13D-ALIGNEDD+8R+0.2D+8.2D+1.9
Oct 26, 20042004 Senate, FLEvenR+1.1D+1.1D+2.3
Oct 26, 20042004 President, FLR+2R+5.0D+3.0D+4.2
Oct 14, 20042004 House, TX-32D-ALIGNEDR+1R+10.3D+9.3D+4.3
Oct 3, 20042004 President, FLD-ALIGNEDD+2R+5.0D+7.0D+4.2
Oct 14, 20022002 House, OK-4D-ALIGNEDR+1R+7.7D+6.7D+0.7
Oct 10, 20022002 Senate, GAD-ALIGNEDD+12R+6.8D+18.8D+11.9
Sep 14, 20022002 Governor, FLD-ALIGNEDR+5R+12.8D+7.8D+7.3
Oct 21, 20002000 Senate, WAD-ALIGNEDR+4D+0.1R+4.1R+1.5
Oct 21, 20002000 Governor, WAD-ALIGNEDD+24D+18.7D+5.3D+0.2
Oct 21, 20002000 President, WAD-ALIGNEDD+6D+5.6D+0.4R+2.5
Sep 11, 20002000 President, WAD+4D+5.6R+1.6R+2.5