This lesson is hard, Allie. Changes in technology have made political polling much more difficult. Every result we get is re-weighted to compensate for cellular penetration, to re-balance the same demographically, and so forth.
I think the day is rapidly approaching when we can no longer rely on random-digit-dialed (RDD) surveys. We have the technology now to get rid of RDD but the alternative is going to be much more expensive. One of these elections, someone is going to bite the bullet and spend the bucks: the results will be much like Literary Digest vs George Gallup in the 1936 Presidential Election. Doing it right will win most of the time.