Hillary Clinton has won an overwhelming majority of black voters who have participated in the Democratic primaries: the Wall Street Journal places her share at 75.9 percent, and my math puts it at 77.9 percent. This is certainly a better showing than we’ve seen seen from Bernie Sanders, who has won support from about a quarter of black voters.

But on this basis, Clinton’s partisans have routinely concluded that their candidate has won some kind of democratic mandate from black Americans. While this is true in the trivial sense — she has won votes from a majority of those who actually voted — this framing overlooks the overwhelming majority of voting-age black Americans who either voted against Clinton or declined to vote at all. In fact, based on an analysis of exit polls, turnout numbers, and census data, an extraordinary 87.9 percent of voting-age black Americans have not voted for Clinton.

Voters, for obvious reasons, don’t report their race at the ballot box, and entrance and exit polling have only been conducted in about half of the fifty states. But those percentages, cross-referenced with turnout results and census reporting on voting-age black Americans in each state, paint a fairly telling picture: