This thread is based on an assumption that Donald Trump is behind. That is merely an assumption. Several current polls place Donald Trump in the lead. The LA Times tracker has given him a small but persistent lead. It's methodology is different than most polls. If it's methodology is correct, Trump may very well be in the lead. If it is flawed, then, maybe Donald Trump is currently behind. In 2012, the Times tracker was claimed to be an outlier. Turns out it projected Obama's final margin. Salt to taste.
No national non-tracking poll has placed Trump in the lead in the last week or two. But keep on telling yourself that.