If Russia has Hillary's emails, they got them a long time ago; definitely before Trump announced his presidential candidacy. That private server has been air-gapped and sitting in Quantico for about two years.
Trump brought this up because Hillary claimed not only could people not have those emails, but that the emails were of no significance to the government and were all about yoga and shopping. Hillary is now admitting that the emails were of importance to national security and that Trump should be ashamed of talking about Russia hacking national security assets. Trump once again forced his opponent to reveal their own weakness. Should we really blame Trump for pointing to the consequences of Hillary's choice to have that private server?
Where does Hillary say that the missing e-mails are of national security?
I suppose a more accurate statement would be "Hillary's campaign" now admits to the emails being a national security issue. I'm sure Hillary still holds this opinion:
I chose not to keep my private personal emails -- emails about planning Chelsea's wedding or my mother's funeral arrangements, condolence notes to friends as well as yoga routines, family vacations, the other things you typically find in inboxes.
The 33,000 deleted emails that weren't handed over to the FBI were just emails about Chelsea's wedding and yoga routines. Why would it be a big deal for Russia to have those emails?
The Russia nonsense, regardless, is a red herring built up so that people ignore the leaks because of who might have released them. Assange claims the leaks came from a DNC insider, not Russians. I'd believe Assange before I believe Hillary shills.