Who is ahead in the Democratic primary race?

[redqueen]

Twenty-seven candidates have thrown their hat into the ring for the Democrats’ presidential nominating contest in 2020. This field, the largest ever, includes United States senators and House representatives, mayors, entrepreneurs and even a self-help guru. Some candidates have already withdrawn. Those who remain are engaged in a battle for the future of the party. This portal will help you keep track of who is winning and who is losing and, perhaps more interestingly, why.

Here you will find our average of each candidate’s performance in all high-quality, national public opinion polls conducted so far as well as the probability of victory inferred from political betting. You will also find data from YouGov, our pollster, breaking down support for each candidate by demographic group. Under “Candidates” you will find further demographic data for each contender.

Above, we have calculated support for each candidate by aggregating publicly available, high-quality opinion polls. We include only surveys from pollsters who conduct their interviews over the phone with a live interviewer—rather than with automated machine recording—or that use rigorous and well-documented online methods.

Breaking down support by demographic group gives an indication of why the contenders are doing well, or poorly, in the national numbers. We have crunched those numbers for the most important demographic categories: race, age, sex, education and ideology. Interested in the strength of Joe Biden’s support among African-Americans? Here’s where to look.

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https://projects.economist.com/democratic-primaries-2020/

Some good visual representations of all the data they're analyzing at the link.