RT is state-supported, but it is only one of a number of sources that all reported pretty much the same thing. Guccifer, who was an unemployed taxi driver when arrested, led to the disclosure of HRC's server, and claims to have hacked it "like, twice."

http://www.nbcnews.com/news/us-news/guccifer-hacker-who-says...

http://www.foxnews.com/politics/2016/05/04/romanian-hacker-g...

http://www.msnbc.com/msnbc/hacker-guccifer-i-got-inside-hill...

^^^ There. Mainstream, American-as-apple-pie sources.