Can We Trust the Presidential-Election Polls?

On October 18, 2016, the New York Times gave Hillary Clinton a ninety-one-per-cent chance of beating Donald Trump. Five days later, ABC News released a tracking poll showing her ahead of Trump by twelve points. Buoyed by the polls, Democrats--especially Democratic women--approached November 8th with a joyful sense of inevitability. The collective disbelief when Clinton lost was tinged with confusion: How could the pollsters have been so wrong? Now, with Joe Biden leading Trump by double digits in the lead-up to Election Day, according to the latest NPR/PBS NewsHour/Marist survey, the question has to be asked: Are voters hoping for a Biden victory about to fall in the same trap?