The DeSart & Holbrook model is captured in the econometric models component of the combined PollyVote forecast. It currently predicts a two-party vote share of 35.7% for Clinton, and 64.3% for Trump in Oklahoma.
Putting the results in context
As any other method, models are subject to bias. As a result, a good strategy is to not have too much faith in the results of an individual econometric model. Rather, one should examine how a model's results compare to benchmark forecasts. The latest PollyVote forecasts Trump to gain 64.3% of the two-party vote in Oklahoma.