You're right. I've had statistics classes. This guy is a poser and knows nothing about sampling and statistics. One thing I love about this board, the idiots don't realize they are idiots and their posts show their stupidity and they don't even realize it.
I can attack both arguments from just this one post instead of getting into both individually.
First, for EER's post.
There were roughly 130 million votes cast in 2016. The sample size Pew used was somewhere between 2K and 3K. That's an extremely small sample size, <1%, wouldn't you say? That isn't to say their results aren't close, they may be, but to claim they are exact based on such a small sample size throws the validity of the survey into question. Again, those numbers may or may not be all the close to the exact, and getting the exact is essentially impossible anyway.
Different polls that conducted the same research found different results. Either way, a few percentage points one way or the other isn't really worth arguing about.
What is worth arguing about is the interpretation of those results. What they really mean for future elections and the belief that what the perceived results were in 16 is what they will be in 20 or 24.
Now, on to 89's diatribe...
First, for someone who took some statistics course, why didn't YOU try to correct me instead of riding the coattails of NYEER? Don't bother answering, I'll do it for you. Because you couldn't.
Second, you shouldn't even bother using nationwide polling in trying to determine the next President. Since you've taken these classes you surely can tell us why.