You have to admit that the methodology is awful.
Unskewing is dumb, I admit. But pointing out that a firm has a bias isnt unskewing. I'm not suggesting that "all the polls" are missing X, Y, or Z types of people, I'm saying this firm clearly appears to have methodological and weighting issues that appear to consistently produce pro Trump results. I'm sure the race has narrowed since the conventions, but I doubt if Emerson was polling 3 weeks ago it would have shown Trump doing about 5 points better than everyone else.