The DeSart model is part of the econometric models component of the combined PollyVote. It currently forecasts a major vote share of 42.7% for Clinton, and 57.3% for Trump in Arizona. In comparison, on August 16, Clinton was predicted to achieve 57.3% of the vote.
Putting the results in context
As a general rule, however, don't have too much faith in the results of single models, as they can incorporate large errors. At the very least, one should examine how a model's results compare to benchmark forecasts.
The DeSart model in comparison with PollyVote's prediction
The latest PollyVote forecasts Trump to gain 51.3% of the two-party vote in Arizona. The results of the DeSart model for Trump are thus 6.0 percentage points above the combined PollyVote in Arizona.