The Big-issue model is captured in the index models component of the PollyVote forecast. According to the model, Clinton will garner 51.1% of the two-party vote share, whereas Trump will win 48.9%.
Putting the results in context
As any other method, index models are subject to bias. Therefore, as a general rule, don't focus too much on the results of an individual index model. At least, one should examine how a index model's results compare to benchmark forecasts.
Results in comparison to other index models
If we look at an average of index models, Clinton's current two-party vote share is at 53.7%. This value is 2.6 percentage points higher than respective numbers in the Big-issue index model.
Comparison to the combined PollyVote
The latest PollyVote foresees Clinton to gain 53.5% of the two-party vote. PollyVote currently predicts Clinton to gain 2.4 percentage points more compared to the results of the Big-issue model.