Cliff Zukin NYT oped concludes:

We are less sure how to conduct good survey research now than we were four years ago, and much less than eight years ago. And don’t look for too much help in what the polling aggregation sites may be offering. They, too, have been falling further off the track of late. It’s not their fault. They are only as good as the raw material they have to work with.

In short, polls and pollsters are going to be less reliable. We may not even know when we’re off base. What this means for 2016 is anybody’s guess.