The Rothschild model is captured in the econometric models component of the PollyVote forecast. It currently predicts a two-party vote share of 1.0% for Clinton and 99.0% for Trump in Montana.
Putting the results in context
As any other method, econometric models are subject to bias. Thus, as a general rule, one should not rely too much on the results of an individual econometric model. At least, one should examine how a econometric model's results compare to benchmark forecasts.
Comparison to the combined PollyVote
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.