Don't you love Gateway Pundit's headlines. They are far from reality.
All this shows is returned early ballots based on party requests. It does not say who they voted for so at this point, we have no clue if they voted for Trump, Hillary, or a third party.
As we know with everything else in this election, we can't assume anything will go along party lines. We saw 12 million registered democrats vote in the Republican primary and most polls show 30-40% of both party's members dissatisfied with their candidate and on the Republican side, 20% + saying they won't vote for Trump.
So the simple answer is, we don't know.