2020 polls badly understated support for GOP candidates, review finds, and nobody's sure why

Joe Biden, Donald Trump
(Image credit: Angela Weiss, Mandel Ngan/AFP/Getty Images)

The 2020 polls were off by an "unusual magnitude," missing the national results by the biggest margin in 40 years and erring in state surveys by the greatest amount in at least 20 years, according to a new study released Monday by the American Association for Public Opinion Research (AAPOR).

"There was a systematic error that was found in terms of the overstatement for Democratic support across the board," said Vanderbilt University political scientist Josh Clinton, chair of the 19-member task force. "It didn't matter what type of poll you were doing, whether you're interviewing by phone or internet or whatever. And it didn't matter what type of race, whether President Trump was on the ballot or was not on the ballot."

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Peter Weber, The Week US

Peter has worked as a news and culture writer and editor at The Week since the site's launch in 2008. He covers politics, world affairs, religion and cultural currents. His journalism career began as a copy editor at a financial newswire and has included editorial positions at The New York Times Magazine, Facts on File, and Oregon State University.