Just a note:
In the Austrian Presidential runoff, a record number of postal ballots was requested (ca. 900.000) and the left-wing candidate won 2/3 of them (incl. my vote).
Yet on election day, the far-right populist candidate won the precinct vote by 52-48 (precinct votes were 85% of the total vote, postal votes were around 15%).
Overall, the result was about 50-50 in the end.
So, despite Dems doing well with the early vote it means nothing about how the overall vote will end up, as Trump's voters are the ones who will most likely vote strongly on election day - rather than early by postal ballot.
You dont have to constantly downplay Hillary's chances. Sometimes evidence dictates she's just doing well.