Is historical bias related to Trump's performance in the polls?

Average Trump approval for each pollster in the 2024 Silver Bulletin presidential approval database, against mean-reverted bias

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Note: 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. Positive scores means the pollster is biased toward Democratic candidates.

Source: Silver Bulletin pollster ratingsGet the data