https://projects.fivethirtyeight.com/democratic-debate-september-poll

Sep 16, 2019 · An initial wave of polling was conducted before the debates began, with a follow-up wave after the debate. The first wave of the poll was conducted from Sept. 5 to Sept. 11 among a general population sample of adults, with 4,320 respondents who say they are likely to vote in their state’s Democratic primary or caucus. For the likely ...