The DeSart & Holbrook model is part of the econometric models component of the combined PollyVote. According to the model, Clinton will collect 43.7% of the two-party vote share in Mississippi, while Trump will win 56.3%.
Putting the results in context
As any other method, models are subject to bias. In general, you should not be too confident the results of a single econometric model. Instead of trusting the results from single models, forecasting research recommends to look at combined models or, even better, a combined forecast that uses forecasts from different methods, each of which uses different data.
Results compared to the combined PollyVote forecast
The most recent PollyVote predicts Trump to gain 55.1% of the two-party vote in Mississippi. The results of the DeSart & Holbrook model for Trump are thus 1.2 percentage points above the combined PollyVote in Mississippi.