Analysis of information sources in references of the Wikipedia article "2016 Democratic National Committee email leak" in English language version.
The evidence suggests WikiLeaks is among the factors that might have contributed to her loss, but we really can't say much more than that.
Julian Assange not only knew that a murdered Democratic National Committee staffer wasn't his source for thousands of hacked party emails, he was in active contact with his real sources in Russia's GRU months after Seth Rich's death. At the same time he was publicly working to shift blame onto the slain staffer "to obscure the source of the materials he was releasing," Special Counsel Robert Mueller asserts in his final report on Russia's role in the 2016 presidential election.