Former vice president Joe Biden’s support in the Democratic presidential nominating contest has long been a function of his robust backing from two particular voting blocs: black Democrats and Democrats who self-identify as moderate.
While the Republican Party is largely conservative, the Democratic Party is still divided between liberal and moderate members. A majority of Democrats in the 2018 General Social Survey, conducted every two years by NORC at the University of Chicago, identify as moderate or “slightly liberal.” About a third identify as liberal or “extremely liberal.”
Again: This is self-identification, meaning that these identities don’t necessarily translate into stances on particular policy positions. It is, however, the same way in which party is identified in the polls that show Biden with strong primary support among moderates.
When we break out the ideological splits above by race, the difference between white non-Hispanic Democrats and Hispanic or black non-Hispanic Democrats is obvious. Sixty percent of black and Hispanic Democrats identify as moderate or slightly liberal. Nearly half of whites identify as liberal or extremely liberal.
According to the GSS data, nearly two-thirds of those identifying as liberal are white. Half of those identifying as slightly liberal are white, too. But blacks constitute a plurality of self-identified Democratic moderates.
In other words, the GSS data suggest that perhaps 16 percent of Democrats are black moderates or conservatives.
Take that with a grain of salt. The density of black Democrats in the GSS data is larger than in other polling, like Pew Research Center’s 2018 data suggesting that about a fifth of Democrats are black. It is, nonetheless, a significant chunk of Democratic voters.
We saw this in South Carolina on Saturday. In that primary, exit polling suggests that black, moderate voters were a central part of Biden’s support.
Percent of electorate
The question for Biden moving forward is whether there are enough black and moderate voters in future contests to allow him to stay even with the delegate lead of Sen. Bernie Sanders (I-Vt.) — or if any anti-Sanders vote will coalesce around him quickly enough to allow him to clinch the nomination.