Factors That Make the 2016 Election Hard to Call

Although the entire array of forecasters followed regularly and reported in the New York Times Upshot election website predicts a Hillary Clinton victory by upwards of 70 percent probability, this remains a volatile election with a variety of factors that produce a lot of caveats in predictions and nervous laughter in pundit conversations.

Some of the factors are normal in an open seat presidential election, but others are particular to this year.