The Issue-index model is captured in the index models component of the PollyVote forecast. The model currently predicts a major vote share of 56.6% for Clinton, and 43.4% for Trump. In comparison, on September 11 Trump was still predicted to garner 44.2% of the vote.
Putting the results in context
As any other method, index models are subject to bias. Thus, as a general rule, don't be too confident the results of a single index model. At the very least, one should check how a index model's results compare to benchmark forecasts.
Comparison to other index models
If we look at an average of index models, Clinton's two-party vote share is currently at 54.2%. In comparison to numbers in the Issue-index index model Clinton's index model average is 2.4 percentage points lower.
Results compared to the combined PollyVote forecast
The most recent PollyVote anticipates Clinton to gain 53.0% of the two-party vote. PollyVote currently predicts Clinton to gain 3.6 percentage points less compared to the results of the Issue-index model.