Hacking attempts were also made on the RNC, but were either less determined or met stiffer defenses, and don't seem to have succeeded.
Firstly, there were no "hacking attempts." Hillary got phished and john podesta left his phone in a taxi.
Julian Assange has said he has similarly private information on the Annoying Orange campaign but that its mundane and uninteresting.
To me it seems probable to definite that the Kremlin was behind the hacks.
There's no proof of this at all. Assange and Kimdotcom have both confirmed that Russia is not the source of the hacks. The only entity pointing fingers at Russia is a private investigation firm that works for the DNC, and whose "investigation" is the sole evidence of their involvement.
マホー