What Did Pollsters Learn from the 2020 Election Polls?
Kathy Frankovic, a polling export who led the survey unit at CBS News for over 30 years and now consults for YouGov, highlighted two plausible hypotheses for the polling industry’s over-estimation of Democratic strength in the election:
- Likely voter models built on past voting practices: Likely voter models were based on the norm of Election-Day voting, and were unprepared for an election in which two thirds of 2020 votes were not cast on Election Day. One to two percent of mail-in votes don’t get counted, but in seven states, about 10% or more are rejected.
- The “missing” Trump voter (as opposed to the “shy” Trump voter): In states which Trump carried with 55% or more of the vote, YouGov pre-election polls showed him tied with Biden. Trump’s bashing of the polls may have discouraged his supporters from participating in polls.