The DeSart & Holbrook model is part of the econometric models component of the PollyVote. According to the model, Clinton will collect 62.2% of the two-party vote share in Illinois, whereas Trump will end up with 37.8%.
Putting the results in context
As any other method, models are subject to bias. As a result, you should not focus too much on the results of a single econometric model. Instead of trusting the results from single models, the evidence-based approach is to consult combined models or, even better, a combined forecast that includes different methods and data.
The DeSart & Holbrook model in comparison with PollyVote's forecast
The most recent PollyVote anticipates Clinton to gain 58.9% of the two-party vote in Illinois. The results of the DeSart & Holbrook model for Clinton are thus 3.3 percentage points above the combined PollyVote in Illinois.