one being that they were totally wrong during the 2016 cycle, and
two,
the amount of die-hard Trump supporters who just toy with pollsters when they call.
Oops.
https://townhall.com/tipsheet/mattvespa/2019/10/25/wsjs-kim-strassel-notes-one-thing-thats-missing-from-all-these-trump-impeachmen-n2555335