No, the Polling Doesn’t Prove Bernie Sanders Won the Hispanic Vote in Nevada

One of Saturday’s biggest election surprises was the entrance and exit polling measuring Hispanic voters in the Nevada caucus. It found that Bernie Sanders defeated Hillary Clinton by eight percentage points among Hispanic voters, overturning months of conventional wisdom about Mrs. Clinton’s strength among nonwhites.

But there are a lot of reasons to question the findings from the polls. They have a small sample of precincts and voters, and they simply were not devised to prov