10 final polls from 2002 to 2018 (average error 3.1 points): too few to grade. Crosstab grades every 2026 pollster on its own results after Election Day.
Open SEA Polling & Strategic Design in the interactive Trust Index All pollster ratings
SEA Polling & Strategic Design has 10 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 3.1 points.
Historically, SEA Polling & Strategic Design's misses leaned D+2.2 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.