I'd love to see a poll about how Trump is doing with veterans, military, and those with a close association to them. It would be fun to see how Trump will do with the female vote compared to the 'pub wannabees. Then how about a survey about how Trump is doing with those age 60 and over, who remember the promise of the country we grew up in?
General surveys do not "catch" specific groups in which a candidate will do far better (or worse) than would happen with the generic voter.
True, I bet that those over 60 are much more inclined to vote for Trump, because, like him, they actually do remember how GREAT America used to be.