Before revision:  Our results for the 2012 and 2016 U.S. races are largely in agreement with those of popular pollsters , and we use our new model to explore how subjective choices about uncertainty impact results.
After revision:  Our results for the 2012 and 2016 U.S. races are largely in agreement with those of popular forecasters , and we use our new model to explore how subjective choices about uncertainty impact results.