When people complain to me about a poll, it’s usually because they think the demographics are wrong. The pollsters polled too many white people, commenters might say, or too many old people. Or perhaps the sample of Hispanic voters doesn’t seem quite Democratic enough.
Most of the time, these comments are wrong.
The biggest reason? They’re comparing pre-election polls to exit polls. And it doesn’t work. CONT.
Nate Cohn, New York Times