I think that the press has blown this up and made it bigger than it will turn out to be in terms of the effect on Trump’s support.
A new poll released Sunday morning shows that a majority of Republican voters want the party to stand by Trump in the wake of recently-published sexually explicit comments he made in 2005. Three-quarters of GOP voters believe Trump should still receive support from the party at large, which just 13 percent said the RNC should abandon him, according to the Politico/Morning Consult poll. Additionally, just 48 percent of Republican voters said the recorded remarks, published Friday by The Washington Post, make them view Trump less favorably, and 36 percent said it did not affect how they view him. — Exclusive poll: GOP voters want the party to stand by Trump, Politico, October 9, 2016
The fact that Trump has made a habit of sexually harassing and assaulting women shouldn’t be much of a surprise to anyone who has paid attention to Trump.
What I do see is that the zeitgeist has turned against Trump and put a win in the Electoral College out of reach.
Huge sections of the “establishment” have turned against Trump. For example, the San Diego Union Editorial Board, which has always backed a Republican, came out for Hillary Clinton.
Trump can’t win if he has lost the entire establishment. While a lot of them don’t like Hillary Clinton, many people have come to realize that Trump is an existential threat to the United States. They will hold their nose and vote for Clinton.