The DeSart & Holbrook model is part of the econometric models component of the combined PollyVote forecast. The model currently forecasts a major vote share of 42.1% for Clinton, and 57.9% for Trump in Montana.
Putting the results in context
As a general rule, however, you should not have too much faith in the results of single models, as they sometimes incorporate large errors. Rather than relying on results from single models, the recommended strategy use combined models or, even better, the combined PollyVote forecast that uses forecasts from different methods, each of which uses different data.
Results compared to the combined PollyVote prediction
The latest PollyVote forecasts Trump to gain 56.6% of the two-party vote in Montana. PollyVote currently predicts Trump to gain 1.3 percentage points less compared to the results of the DeSart & Holbrook model.