Montana Democrats are more left-wing than Democrats in other states, except perhaps for guns.
Yeah, it makes perfect sense. Sanders repersents a rural state, and Montana is a rural state. Montana Democrats are pro-gun progressive economic populists. Think of Tester and Schweitzer. So it makes perfect sense for Sanders to be doing better in Montana than Hillary.
Most of the people taking part in the poll don't know who Sanders is and don't know anything about his positions. They just know he's a Democrat who isn't Hillary Clinton.
Sure, but that speaks to how terrible a candidate Clinton is in the Mountain West.