The much-lauded Emerson College poll of Utahans, which put independent candidate Evan McMullin ahead of Trump and Clinton, has its own issues regarding reliability. FiveThirtyEight found  that among 12 pollsters (ranging from Fox News to Marist), Emerson was one of four pollsters which underperformed. Emerson College received a ‘B’ rating  from FiveThirtyEight, as well. Also, note that the Emerson College poll  is conducted, in part, by college students, which could affect reliability.
Additionally, Hot Air did an interesting analysis  of Emerson’s polling in Ohio and Pennsylvania, and discussed how some of Emerson’s poll results would raise an eyebrow under normal circumstances.