She hasn't trailed a national poll since May.
I know it's really early to draw any conclusions from polls but the Reuters poll from 6/20 had some interesting data. (polling.reuters.com)
If you filter:
White + college: Hillary +7
White + HS or some college + no HS: Trump + 12
I took the above data and put it into 538's little demographics map generator (projects.fivethirtyeight.com), and not changing anything else, except rounding Hillary down to 53%. Also assuming undecideds split 50/50.
The results: Hillary 413, Trump 125.
Yeah, it's early yet, but it ain't looking too good for the short fingered vulgarian.