Silver Bulletin pollster ratings

Letter grade, Predictive Plus-Minus, and mean-reverted bias for each pollster in the Silver Bulletin database

Note: Our letter grades are based on a pollster's Predictive Plus-Minus rating. Predictive Plus-Minus is our projection of how much error we think the pollster will have in future elections relative to the average pollster. Negative scores mean the pollster is projected to have less error than average. Mean-reverted bias is a pollster's historical average statistical bias toward Democratic or Republican candidates, reverted to a mean of zero based on the number of polls in our database.
Updated February 17, 2025Get the data