Pollsters · Updated Oct 29, 2026
Harris Insights & Analytics
17 public polls in the 2026 cycle of the generic congressional ballot. Latest: Oct 26, 2026.
Also listed as HarrisX/Harris Poll.
- Polls
- 170 in 0 races · 17 generic ballot
- Grade
- B+Accuracy in past elections, A+ to D (how)
- House effect, 2026
- R+3.2Against other polls, in today's forecast
- House effect, past elections
- R+0.4Against other polls of the same races
Based on 177 polls of 121 races taken in the last three weeks before elections from 1998 to 2020: they missed the final margin by 5.7 points on average, 0.1 points less than other polls of the same races.
Its polls run 3.2 points more Republican than other polls of the same races; the forecast removes that before averaging.
In past elections its polls ran 0.4 points more Republican than other polls of the same races; today's estimate starts from that.
Generic congressional ballot
Which party voters would back for the House. The national House forecast.
| Dates | Sample | Dem. | Rep. | Margin | Source |
|---|---|---|---|---|---|
| Oct 24–Oct 26 for Harvard CAPS | — LV | 52 | 48 | D+4 | harvardharrispoll.com ↗ |
| Sep 26–Sep 28 for Harvard CAPS | 2,200 RV | 50 | 50 | Even | harvardharrispoll.com ↗ |
| Sep 26–Sep 28 for Harvard CAPS | — LV | 51 | 49 | D+2 | harvardharrispoll.com ↗ |
| Aug 28–Aug 30 for Harvard CAPS | 2,100 RV | 51 | 49 | D+2 | harvardharrispoll.com ↗ |
| Aug 28–Aug 30 for Harvard CAPS | — LV | 49 | 51 | R+2 | harvardharrispoll.com ↗ |
| Jul 11–Jul 12 for Harvard CAPS | 1,776 RV | 50 | 50 | Even | harvardharrispoll.com ↗ |
| Jul 11–Jul 12 for Harvard CAPS | — LV | 51 | 49 | D+2 | harvardharrispoll.com ↗ |
| May 29–May 31 for Harvard CAPS | 1,725 RV | 51 | 49 | D+2 | harvardharrispoll.com ↗ |
| Apr 23–Apr 26 for Harvard CAPS | — LV | 50 | 50 | Even | harvardharrispoll.com ↗ |
| Mar 25–Mar 26 for Harvard CAPS | 2,009 RV | 51 | 49 | D+2 | harvardharrispoll.com ↗ |
| Mar 25–Mar 26 for Harvard CAPS | — LV | 52 | 48 | D+4 | harvardharrispoll.com ↗ |
| Feb 25–Feb 26 for Harvard CAPS | 1,999 RV | 50 | 50 | Even | harvardharrispoll.com ↗ |
| Feb 25–Feb 26 for Harvard CAPS | — LV | 50 | 50 | Even | harvardharrispoll.com ↗ |
| Jan 28–Jan 29 for Harvard CAPS | 1,000 RV | 54 | 46 | D+8 | harvardharrispoll.com ↗ |
| Jan 28–Jan 29 for Harvard CAPS | 1,000 RV | 41 | 41 | Even | harvardharrispoll.com ↗ |
| Jan 28–Jan 29 for Harvard CAPS | — LV | 47 | 44 | D+3 | harvardharrispoll.com ↗ |
| Jan 28–Jan 29 for Harvard CAPS | — LV | 52 | 48 | D+4 | harvardharrispoll.com ↗ |