The DeSart & Holbrook model is included in the econometric models component of the PollyVote forecast. According to the model, Clinton will collect 42.7% of the two-party vote share in South Dakota, whereas Trump will win 57.4%.
Putting the results in context
In general, however, you should not have too much faith in the results of single models, because they sometimes contain large errors. Instead of trusting the results from single models, the best practice scientific advice is to use combined models or, even better, the combined PollyVote forecast that uses forecasts from different methods, each of which draws upon different data.
Results compared to the combined PollyVote prediction
The most recent PollyVote predicts Trump to gain 58.9% of the two-party vote in South Dakota. The results of the DeSart & Holbrook model for Trump are thus 1.5 percentage points below the combined PollyVote in South Dakota.