The Crosstab model released an updated prediction of the election outcome. The model currently predicts a two-party vote share of 49.0% for Clinton, and 51.0% for Trump in Iowa. In comparison, on October 25, Clinton was predicted to collect 49.8% of the vote.
In Iowa, the popular vote is usually decided by a narrow margin. This is the reason why the state is commonly regarded as a swing state, which makes it particularly interesting from a forecasting perspective.
Putting the results in context
As a general rule, however, you should not have too much faith in the results of single models, as they may incorporate large errors. Rather, one should check how a model's results compare to benchmark forecasts.
The Crosstab model in comparison with PollyVote's forecast
The current PollyVote predicts Trump to gain 49.7% of the two-party vote in Iowa. PollyVote currently predicts Trump to gain 1.3 percentage points less compared to the results of the Crosstab model.