I think the media, Establishment, Democrat Party, Clinton Campaign... who-ever you want to credit for this exposure had this, and probably have much more, that they can and will air out in the media over the course of the next 30 days.
These character flaws of Trump were always known, they looked forward to him being the Republican Candidate mainly because of this, that there was so much material they could use to destroy his reputation/image.
He remains popular with a majority of Americans because:
A) He is NOT a career politician and NOT part of the Washington elite.
B) He is constantly attacked and belittled by the media, from Foxnews to MSNBC, from the NYTimes to the Post... the media comes up with scandal after scandal, negative report after negative report...
No one trusts the media... you know... the media that tried to convince American's that Benghazi and the riots across the Middle East were caused by a YouTube video.
The Media that covered up the Democrat Party's back room deals to destroy Bernie's campaign even as he was winning state after state inspite of their corrupt efforts and coin flips.
C) If just about ALL the politicians, media, and whackos in Hollywood are against him... then there MUST be something to what he is saying; and he certainly isn't part of the establishment, but rather, a legit Outsider, and ANY outsider will be supported by many over a canned and corrupt politician who is the poster child for all that is wrong in Washington.
It doesn't matter, no matter how many votes go to Trump, the Electoral College will hand Hillary the Presidency just like she was handed the nomination for the Dem Party over Bernie. You can take that to the Bank.