10/27 - 10/30 Trump +1That's a 13 point shift in a 10 day period. [ADDED: The +12 number is an average of several days, beginning on the 20th, and ending on the 23rd, so you might characterize the shift as occurring in 7 days, a more drastic plunge.]
10/23 - 10/26 Clinton +4
10/21 - 10/24 Clinton +9
10/20 - 10/23 Clinton +12
Here's the graph, at an ABC news article:
The news article plays down what to me looks like a disastrous plunge:
Strong enthusiasm for Hillary Clinton has ebbed since the renewal of the FBI’s email investigation. While vote preferences have held essentially steady...Huh?
... she’s now a slim point behind Donald Trump -- a first since May -- in the latest ABC News/Washington Post tracking poll, produced for ABC by Langer Research Associates.There's a second graph at that link showing also a big shift in the "strong enthusiasm" people. In the October 22 tracking poll, 52% of those likely to vote for Clinton had "strong enthusiasm," which only 49% of Trump's people had. By October 30, Clinton had slipped 7 points to 45% and Trump picked up 4 points to 53%.
One thing seems clear: Trump rode out the disaster of the pussy-grabbing remark and what looked like corroborating accusations from a number of women. It had seemed that he was destroyed, sinking fast, and no decent people would stick with him. We'd have to desert the sinking ship...
... and get on S.S. Clinton. There was nowhere else to go. But that Trump hulk stayed afloat, and now it's The Clinton that feels deeply infected....
We gotta get outta here.