Marist comes out ahead on 5 of 7 measures in the Crosstab Trust Index, which grades pollsters on how close their final polls came to actual results from 1998 to 2022.
| Measure | Change | Marist |
|---|---|---|
| Trust Score | 33/100 | 61/100 ★ |
| Average error how far final polls missed the result | 5.6 pts | 4.8 pts ★ |
| Versus expected error compared with what its races predicted | 0.7 worse | 0.1 worse ★ |
| Consistency random miss once its tilt is removed | ±4.5 pts ★ | ±4.7 pts |
| Historical bias closer to even is better | D+3.2 | D+0.4 ★ |
| Winners called | 71% | 80% ★ |
| Track record final polls analyzed, 1998–2022 | 102 polls | 130 polls |
| 2026 polls | 13 | 11 |
| 2026 lean versus other polls of the same races | D+0.8 ★ | D+3.1 |
| Race | Change (latest) | Marist (latest) |
|---|---|---|
| Iowa Senate | Turek 41, Hinson 44 | Turek 50, Hinson 42 (D+8.1 vs. avg) |
Compare them in the interactive Trust Index All pollster ratings
More comparisons: Change Research vs. YouGov · Marist College vs. YouGov · Change Research vs. Emerson College · Emerson College vs. Marist College · Change Research vs. University of New Hampshire Survey Center · Marist College vs. University of New Hampshire Survey Center · Change Research vs. New York Times/Siena College · Marist College vs. New York Times/Siena College
Marist has the smaller average error (4.8 pts vs. 5.6 pts). Overall, marist comes out ahead on 5 of 7 measures in the Crosstab Trust Index (Change: C+, Trust Score 33; Marist: B+, Trust Score 61).
Change (D+0.8 versus other polls of the same races) compared with Marist (D+3.1). Lean describes how a pollster's numbers compare with others; it isn't a measure of accuracy.
Yes: 1 race in Crosstab's data, including Iowa Senate.
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.