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

Hart Research Associates/Public Opinion Strategies

Method: live phone · scored polls from 1998 to 2024

Versus the field
−0.05
points of error vs. other pollsters in the same races, after shrinkage (unshrunk −0.33; 19% own record)
Average miss
3.7
points on the margin, as published
House effect
D+0.1
lean relative to other polls of the same races
Scored polls
80
21 races · 24 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
199823.41.3D+1.4
200083.5+0.2R+1.1
200214.70.9R+0.7
200314.16.8R+4.7
200462.90.7D+0.3
200644.11.3R+0.1
2008103.00.9D+1.8
201011.51.2R+0.2
201261.80.5D+0.7
201487.0+2.3D+1.6
201695.1+0.9D+1.4
201841.31.7R+0.1
202085.4+1.0D+1.2
202242.11.4R+0.8
202482.70.8R+1.3
This cycle

2026 polls in the database

EndedRaceMatchupAs published
Sep 15, 2026Generic ballotD+5
Jul 12, 2026Generic ballotD+4
Jun 7, 2026Generic ballotD+5
Apr 19, 2026Generic ballotD+4
Mar 3, 2026Generic ballotD+6
Dec 8, 2025Generic ballotD+4
Oct 28, 2025Generic ballotD+8
Oct 12, 2025Generic ballotD+1
Aug 3, 2025Generic ballotD+5
Apr 19, 2025Generic ballotD+4
Apr 13, 2025Generic ballotD+2
Mar 11, 2025Generic ballotD+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
Nov 2, 20242024 PresidentR+1R+1.5D+1.0D+3.7
Nov 2, 20242024 Generic ballotD+1R+2.7D+3.7D+3.5
Oct 19, 20242024 PresidentR+2R+1.5R+0.5D+3.7
Oct 19, 20242024 Generic ballotR+4R+2.7R+1.3D+3.5
Oct 8, 20242024 PresidentR+1R+1.5D+1.0D+3.7
Oct 8, 20242024 Generic ballotEvenR+2.7D+2.7D+3.5
Sep 17, 20242024 PresidentD+6R+1.5D+7.0D+3.7
Sep 17, 20242024 Generic ballotD+2R+2.7D+4.7D+3.5
Nov 5, 20222022 Generic ballotD+1R+2.6D+3.6D+2.9
Oct 18, 20222022 Generic ballotR+1R+2.6D+1.6D+2.9
Oct 16, 20222022 Generic ballotR+2R+2.6D+0.6D+2.9
Sep 13, 20222022 Generic ballotEvenR+2.6D+2.6D+2.9
Oct 31, 20202020 PresidentD+10D+4.4D+5.6D+4.3
Oct 31, 20202020 Generic ballotD+5D+3.0D+2.0D+3.9
Oct 24, 20202020 PresidentD+11D+4.4D+6.6D+4.3
Oct 12, 20202020 PresidentD+11D+4.4D+6.6D+4.3
Oct 12, 20202020 Generic ballotD+8D+3.0D+5.0D+3.9
Oct 1, 20202020 PresidentD+14D+4.4D+9.6D+4.3
Sep 16, 20202020 PresidentD+8D+4.4D+3.6D+4.3
Sep 16, 20202020 Generic ballotD+7D+3.0D+4.0D+3.9
Nov 3, 20182018 Generic ballotD+7D+8.5R+1.5R+0.9
Oct 17, 20182018 Generic ballotD+9D+8.5D+0.5R+0.9
Oct 7, 20182018 Generic ballotD+6D+8.5R+2.5R+0.9
Sep 19, 20182018 Generic ballotD+8D+8.5R+0.5R+0.9
Nov 4, 20162016 PresidentD+4D+2.2D+1.8D+3.1
Nov 4, 20162016 HouseD+3R+1.0D+4.0D+4.5
Oct 23, 20162016 PresidentD+9D+2.2D+6.8D+3.1
Oct 12, 20162016 PresidentD+11D+2.2D+8.8D+3.1
Oct 12, 20162016 HouseD+2R+1.0D+3.0D+4.5
Oct 9, 20162016 PresidentD+9D+2.2D+6.8D+3.1
Oct 9, 20162016 HouseD+6R+1.0D+7.0D+4.5
Sep 18, 20162016 HouseD+3R+1.0D+4.0D+4.5
Sep 18, 20162016 PresidentD+6D+2.2D+3.8D+3.1
Oct 31, 20142014 HouseEvenR+5.6D+5.6D+4.0
Oct 20, 20142014 HouseR+11R+5.6R+5.4D+4.0
Oct 13, 20142014 HouseR+5R+5.6D+0.6D+4.0
Oct 10, 20142014 HouseR+1R+5.6D+4.6D+4.0
Oct 6, 20142014 HouseD+5R+5.6D+10.6D+4.0
Sep 29, 20142014 HouseD+3R+5.6D+8.6D+4.0
Sep 22, 20142014 HouseD+5R+5.6D+10.6D+4.0
Sep 16, 20142014 HouseD+4R+5.6D+9.6D+4.0
Nov 2, 20122012 PresidentD+1D+3.9R+2.9R+1.7
Nov 2, 20122012 HouseD+2D+1.1D+0.9R+0.1
Oct 19, 20122012 HouseD+2D+1.1D+0.9R+0.1
Oct 19, 20122012 PresidentEvenD+3.9R+3.9R+1.7
Sep 28, 20122012 PresidentD+5D+3.9D+1.1R+1.7
Sep 14, 20122012 PresidentD+5D+3.9D+1.1R+1.7
Oct 29, 20102010 HouseR+5R+6.5D+1.5D+1.7
Nov 1, 20082008 HouseD+12D+10.6D+1.4R+2.1
Nov 1, 20082008 PresidentD+8D+7.4D+0.6R+2.8
Oct 19, 20082008 HouseD+11D+10.6D+0.5R+2.1
Oct 19, 20082008 PresidentD+11D+7.4D+3.6R+2.8
Oct 4, 20082008 PresidentD+6D+7.4R+1.4R+2.8
Oct 4, 20082008 HouseD+13D+10.6D+2.5R+2.1
Sep 21, 20082008 HouseD+13D+10.6D+2.5R+2.1
Sep 21, 20082008 PresidentD+2D+7.4R+5.4R+2.8
Sep 17, 20082008 PresidentD+2D+7.4R+5.4R+2.8
Sep 7, 20082008 PresidentD+1D+7.4R+6.4R+2.8
Oct 29, 20062006 HouseD+15D+7.9D+7.1D+4.2
Oct 15, 20062006 HouseD+15D+7.9D+7.1D+4.2