Washington, DC, October 16, 2019 — Ipsos, along with FiveThirtyEight, tracked the Democratic candidate standing before and after the October 15th debate. Our post-debate polling shows that the debate's top performers, according to self-reported Democratic debate watchers, are Elizabeth Warren, Joe Biden, and Pete Buttigieg. Tulsi Gabbard was seen as having the worst performance out of the twelve candidates on stage last night. Following the debate, the two front-runners, Biden and Warren, have almost equal favorability among Democrats, at 70% and 69% favorability respectively. See all the analysis at our partner's site with the topline data available on the download link.
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About the Study
This 538 Debate/Ipsos Poll was conducted October 7th to 14th, 2019 by Ipsos Public Affairs KnowledgePanel® – a division of Ipsos. This poll is based on a nationally-representative probability sample of adults age 18 or older. Questions presented in this document were only asked of those who are likely to vote in the Democratic primary or caucus (n=3,360)
The survey was conducted using the web-enabled KnowledgePanel®, which is the largest and most well-established online panel that is representative of the adult US population. Our recruitment process employs a scientifically developed addressed-based sampling methodology using the latest Delivery Sequence File of the USPS – a database with full coverage of all delivery points in the US. Households are randomly selected from all available households in the U.S. Persons in these households are invited to join and participate in the web-enabled KnowledgePanel®. For those potential panel members who do not already have internet access, Ipsos provides a tablet and internet connection at no cost to the panel member. Those who join the panel and who are selected to participate in a survey are sent a unique password-protected log-in used to complete surveys online. As a result of our recruitment and sampling methods, samples from KnowledgePanel cover all households regardless of their phone or internet status and provide fully representative online samples to the research community.
The study was conducted in both English and Spanish. The data were weighted to adjust for gender by age, race, education, Census region, metropolitan status, and household income. The demographic benchmarks came from the 2018 March supplement of the U.S. Census Bureau’s Current Population Survey (CPS). The weighting categories were as follows:
- Gender (Male/Female) by Age (18–29, 30–44, 45–59, and 60+)
- Race/Hispanic Ethnicity (White/Non-Hispanic, Black/Non-Hispanic, Other or 2+ Races/Non-Hispanic, Hispanic)
- Education (Less than High School, High School graduate, Some College, Bachelor and beyond)
- Census Region (Northeast, Midwest, South, West)
- Metropolitan status (Metro, non-Metro)
- Household Income (Under $25,000, $25,000-$49,999, $50,000-$74,999, $75,000-$99,999, $100,000-$149,999, $150,000+)
The margin of sampling error among those likely to vote in the Democratic primary or caucus is plus or minus 1.83 percentage points at the 95% confidence level. The margin of sampling error takes into account the design effect, which was 1.17. The margin of sampling error is higher and varies for results based on sub-samples. In our reporting of the findings, percentage points are rounded off to the nearest whole number. As a result, percentages in a given table column may total slightly higher or lower than 100%. In questions that permit multiple responses, columns may total substantially more than 100%, depending on the number of different responses offered by each respondent.
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