Sure Russia probably amplified it but it was wall to wall across ALL media a few days before the election - when undecideds are going to vote. And the big damage from the first hit.
The corruption, thinks she is above the rules, tarmac with Lynch etc. That hit really hard with the small slice of swing voters and maybe more importantly reduced turnout from Ds
I don't think anyone who would believe pizza gate would ever vote for Hillary lol e.g. not a swing voter to begin with
I completely agree that Comey bringing it back into the front page played a bigger role but I wouldn’t rule out all of the social media trolling having more than a little influence. It seemed to leave a lot of reporters covering non-stories lest they be accused of bias again.