Election 2020 Polling Field Guide – Pew Research Center Methods | Pew Research Center

While survey research in the United States is a year-round undertaking, the public’s focus on polling is never more intense than during the run-up to a presidential election. This essay is our attempt as survey methodologists and social science researchers to assess the state of the craft in 2019.
https://www.pewresearch.org/methods/2019/11/19/a-field-guide-to-polling-election-2020-edition/