… Election polling is in near crisis, and we pollsters know. Two trends are driving the increasing unreliability of election and other polling in the United States: the growth of cellphones and the decline in people willing to answer surveys. …
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. CONT.
Cliff Zukin (Rutgers), New York Times