Even: Ipsos and Siena split the 6 measures in the Crosstab Trust Index, which grades pollsters on how close their final polls came to actual results from 1998 to 2022.
| Measure | Ipsos | Siena |
|---|---|---|
| Trust Score | 60/100 | 67/100 ★ |
| Average error how far final polls missed the result | 4.7 pts ★ | 5.7 pts |
| Versus expected error compared with what its races predicted | 0.1 worse | 0.2 better ★ |
| Consistency random miss once its tilt is removed | ±4 pts ★ | ±5.1 pts |
| Historical bias closer to even is better | D+2.4 ★ | R+3.2 |
| Winners called | 73% | 89% ★ |
| Track record final polls analyzed, 1998–2022 | 175 polls | 57 polls |
| 2026 polls | 14 | 13 |
| 2026 lean versus other polls of the same races | — | D+2.7 |
Compare them in the interactive Trust Index All pollster ratings
More comparisons: Ipsos vs. YouGov · Siena College vs. YouGov · Emerson College vs. Ipsos · Emerson College vs. Siena College · Ipsos vs. University of New Hampshire Survey Center · Siena College vs. University of New Hampshire Survey Center · Ipsos vs. New York Times/Siena College · New York Times/Siena College vs. Siena College
Ipsos has the smaller average error (4.7 pts vs. 5.7 pts). Overall, even: Ipsos and Siena split the 6 measures in the Crosstab Trust Index (Ipsos: B+, Trust Score 60; Siena: A-, Trust Score 67).
Grades: Crosstab Trust Index, computed from FiveThirtyEight's pollster-ratings data (CC BY 4.0), 1998–2022; 2026 measures from Crosstab's polling data.
Updated 2026-10-04 · Crosstab, nonpartisan polling analysis.