Julian Assange has said a number of times that the sources behind the DNC and Clinton emails are NOT Russian, but rather, they are DNC whistleblowers.
There has been much speculation surrounding the death of Seth Rich, a DNC staffer that was mysteriously gunned down in his peaceful, low crime neighborhood in July. Many believe Seth was one source of the 20,000 emails that has embarrassed the DNC and forced the resignation of the DNC chair. Considering the $20,000 reward offered by Wikileaks for information leading to the arrest of the person responsible for Seth's murder, it's highly likely that Julian Assange is letting people know, Seth was at least one of his sources.
Personally, I am more inclined to believe that people who have worked with/for the DNC are not all bad and some actually do have a conscience – it's just some of those who are aware of the corruption don't feel safe in sharing what they know. And I don't blame them. The Clinton body count is rising at a rapid rate.
