One other thing to consider: US elections are by definition secure from a wholesale hacking on account of the election being run on a patchwork of systems that differ from state to state (and sometimes county to county or even precinct to precinct). However, this same design and subsequent long list of vulnerabilities found in election machines and their software means that it would be possible to tip crucial precincts and districts in surgical, spear-phishing style attacks that may not attract all that much attention.
EDIT: Wow, quick to downvote. I thought we were in favor of waiting until the investigation concludes to say decisively whether or not collusion happened.
This included the Dem voter turnout model, "worth millions" according to Nevins.
Guccifer 2 forwarded Nevin's analysis to Trump associate Roger Stone.
Story at Wall Street Journal, May 25 2017. Short non pay wall version on Ars Technica.
I can dig up further info if anybody wants, but it shouldn't be too hard to find. This is the first report I came across:
http://www.msnbc.com/rachel-maddow/watch/voter-data-manipula...
Also see Russian activities in the Ukraine, Bulgaria, etc.
Really, you've never heard of social engineering/hacking? https://en.wikipedia.org/wiki/Social_hacking
"Election hacking" conjures images of manipulating voting machines, but what Russia did based on that link you provided was simply find unsavory things the DNC has done in order to bring negative PR to the party.