In 2016, pollsters Arie Kapteyn and Robert Cahaly saw Trump coming. In 2020, they see polls again underestimating his support.
A great interview on Politico with two of the pollsters that got it right in 2016.
‘With Nov. 3 racing toward us, it can be tempting to see the 2020 election as a done deal. For months, Joe Biden has consistently and convincingly led Donald Trump in polls. Swing states in the industrial Midwest and Sun Belt appear to be heading Biden’s way, and if you trust the polls, it’s not a leap to imagine him winning 330+ electoral votes.
But what if you shouldn’t trust the polls?”
The article goes on to say:
“This year, both men believe that polls could again be undercounting Trump’s support. The reason is “shy” Trump voters—people reluctant to share their opinions for fear of being judged. Though the “shy voter” idea is thrown around a lot by both Trump supporters and Democratic skeptics, Kapteyn and Cahaly have specific insights into why, and how, Trump support might be going undetected.
For Cahaly, those votes are likely to make the difference again. “There’s a lot of hidden Trump votes out there,” he says. “Will Biden win the popular vote? Probably. I’m not even debating that. But I think Trump is likely to have an Electoral College victory.”
Read the full interview here:
https://www.politico.com/news/magazine/2020/10/29/2020-polls-trump-biden-prediction-accurate-2016-433619
It is lengthy but well worth your time.