11 final polls from 2010 to 2020 (average error 12.3 points): too few to grade. Crosstab grades every 2026 pollster on its own results after Election Day.
Open Nielson Brothers Polling in the interactive Trust Index All pollster ratings
Nielson Brothers Polling has 11 final polls in the 1998–2022 results data, too few to receive a grade (at least 20 graded polls are needed). Its average error was 12.3 points.
Historically, Nielson Brothers Polling's misses leaned D+12.3 on average. Lean describes how its numbers compare; it isn't an accusation of bias.
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.