The DeSart model published an updated forecast of the election result. The model currently forecasts a two-party vote share of 37.9% for Clinton and 62.1% for Trump in South Dakota. In comparison, on August 7, Clinton was predicted to end up with 62.1% of the vote.
Putting the results in context
In general, however, a good strategy is to not have too much faith in the results of single econometric models, since they can incorporate large errors. Instead of trusting the results from single econometric models, you should rely on combined econometric models or, even better, a combined forecast that includes forecasts from different methods, each of which includes different data.
Comparison to other econometric models
An average of recent econometric models in South Dakota has Trump at 59.5% of the two-party vote. Compared to his numbers in the DeSart model Trump's econometric model average is 2.6 percentage points worse.
Comparison to the combined PollyVote
The results of the DeSart model for Trump are thus 2.8 percentage points above the combined PollyVote, which at the moment predicts a value of 59.3% in South Dakota. In comparison, a look at the PollyVote national prediction for Trump indicates that the actual results are 14.8 percentage points higher.