According to the RealClearPolitics 2016 record of polls, on this date in 2016 Clinton was ahead by 6.9 points in the RCP polling average. Today, Harris is ahead by 0.5 in the RCP average.
Some other current polling averages..
538 - Harris +2.3
RaceToTheWH - Harris +1.6
SilverBulletin - Harris +2.5
About a week after this date in 2016, Trump shook up his campaign staff. Trump removed Paul Manafort, who later went to jail, from the position of campaign manager. Trump replaced Manafort with Steve Bannon, who is currently in jail.
I expect Trump to repeat the 2016 strategy by shaking up his campaign in the next few days. Can he repeat the 2016 comeback to eke out another electoral college win?