The Rothschild model is part of the econometric models component of the combined PollyVote forecast. It currently forecasts a two-party vote share of 1.0% for Clinton and 99.0% for Trump in Montana.
Putting the results in context
In general, however, one should not have too much faith in the results of single econometric models, as they may incorporate large errors. Rather, one should check how a econometric model's results compare to benchmark forecasts.
The Rothschild model in comparison with PollyVote's prediction
Clinton has 41.9 percentage points less and Trump has 41.9 percentage points more when the results of the econometric model are compared to the combined PollyVote forecast for Montana.