I see this claim on donut twitter a lot, yet nobody can show anything close to a credible source on the question. Here's the best example I've found:
https://www.nytimes.com/2016/12/09/us/obama-russia-election-hack.html
tl;dr: Anonymous "intelligence officials" claims that Russia hacked GOP servers, but no evidence or detail about the nature of the documents presented. No claim that Russia provided those documents to wikileaks (which doesn't look good for your point, friend). Also, fwiw, GOP officials deny their networks were compromised.
Why did you not post these FOLLOW UP LINKS that acknowledged the NYT fucking up (to put it charitably) with that article?
https://www.washingtonpost.com/blog...-the-lead-in-pre-election-russia-trump-story/
https://www.nytimes.com/2017/01/20/public-editor/trump-russia-fbi-liz-spayd-public-editor.html