I've performed my own analysis of election memes and I independently confirmed a staggering amount of Trump-related traffic with significantly above-average upvotes across several major media platforms.
https://iandennismiller.github.io/election-memes/
I wrote this 2 weeks before the election and even then, I was already looking closely at bot/sock puppet activity. I didn't connect everything at the time, but I now view the shockingly pro-Trump traffic in an even-more-skeptical light.
For some, there will never be enough evidence to prove social media were subverted for the purpose of influencing the election. For my purposes, however, I appreciate the PDF linked in this thread because it is actually relevant to my social media research. I am happy to cite the intelligence report as context for the social media findings I reported on.
I do not consider the book to be "closed" on this matter, but I do condemn all the commenters in this thread who are attempting to shut down the conversation by claiming there's not enough "evidence."
In closing, I quote from the report:
> This report is a declassified version of a highly classified assessment; its conclusions are identical to those in the highly classified assessment but this version does not include the full supporting information on key elements of the influence campaign.