The Crosstab model is included in the econometric models component of the combined PollyVote. According to the model, Clinton will achieve 46.6% of the two-party vote share in South Carolina, while Trump will end up with 53.4%. In comparison, on October 30, Clinton was predicted to collect 46.7% of the vote.
Putting the results in context
As any other method, models are subject to bias. Thus, as a general rule, you should not be overly confident the results of an individual econometric model. At least, one should check how a model's results compare to benchmark forecasts.
Results compared to the combined PollyVote prediction
The most recent PollyVote predicts Trump to gain 54.3% of the two-party vote in South Carolina. PollyVote currently predicts Trump to gain 0.9 percentage points more compared to the results of the Crosstab model.