Interesting polling since Hillary is supposed to be less popular in the Mountain West.
The Democrats have been leaving too many states to the Republicans.
Montana is winnable in a year where a Democrat is a pickup winner and/or puts up a strong margin that includes contesting the state. (Around 12,000 more votes switched would have delivered a Democratic pickup of the state to Barack Obama in Election 2008.)
Idaho is one of the last states in line. A Democrat would have to win north of 40 states to feasibly win in Idaho, Utah, Wyoming, and Oklahoma. (Ditto Alabama and Mississippi.)