For all of the talk on Atlas regarding Nevada, from the Mormon community, Latinos, English only polls, and recent trending, Dem's over-performing on ED vs Pre-ED polling, and "White Education Voter Gap", there is a major factor that has been largely ignored.
Great analysis overall. NV definitely cannot be written off as safe for Clinton. Polling errors in the past are polling errors in the past; Monmouth is a great pollster and knows that and has likely adjusted their model with awareness of that.
It's a small state... 
I don't think you know how this works...
