Trump’s polls are numerous and all over the map, with some pointing up, others pointing downward. Generally, he is about where he was a week and a half ago, with him losing to Her by roughly 4 points. It’s not clear what has happened since the start of the month to cause this, but I suspect it is Trump’s lack of emphasis on his message of inclusiveness that he outlined in his North Carolina PIVOT speech, as well as fallout from Trump foundation coverage and his immigration speech, which was viewed as insufficiently inclusive by the press.
In any case, Her fainting spell w/pneumonia (read the comments) will remedy that.
As for what happens if she dies (I hope she doesn’t; she’s the worst Democratic nominee since Dukakis), Kaine will simply replace Her as the nominee, the gender gap will shrink, and people will go to the polls intending to vote for Kaine when they vote Clinton. The electors will vote for Kaine if “Clinton” wins. The end.