Ultimately, it could possibly be Hillary's private and VULNERABLE email account that was the pathway the Russian hackers used to gain access to White House systems.
I’ve read that Hillary tried to bring Sid onboard when she was appointed Secretary of State - but Obama said NO.
And .. I can’t decide if allowing this hack is her way to get back at his refusal, or if Obama didn’t want Sid for a really good reason - Obama knew Sid would try to get access to the innards through Hillary.
Take your pick. I’ve always had my concerns about Sid anyway.