PUBLISHED Mar. 25, 2021, at 10:00 AM

FiveThirtyEight’s Pollster Ratings

Based on the historical accuracy and methodology of each polling organization’s polls.

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Nielson Brothers Polling

Pollsters with a relatively small number of polls now receive a provisional rating rather than a precise letter grade.
C/D
Polls analyzed11
Races called correctly91%
Most recent cycle2020
Affiliated with professional polling organization (NCPP/AAPOR/Roper)No

How accurate are the polls from Nielson Brothers Polling?

Polls conducted within 21 days of an election (based on the poll’s median date) are used to determine the pollster’s grade.

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