Yes he is.
The "interesting" thing that has been found, were emails with the state.gov email address, and emails that come back to Hillarys server. That was done with a scan.......WITHOUT opening any emails. So something interesting was found, and it was enough to reopen the case.
Well actually the addresses aren't surprising. Emails have header information that is used for admins to see all how an email was routed and delivered. Header information is seperate from the information inside the email. I was considering making a post explaining how most likely Clintons email situation was configured. One part being she and her state department staff most likely had a mailbox on state.gov servers a with forward set to go to her private server. Her staff would have mailboxes there too because it's pretty common for someone like a Secretary of State to have at least one person help managing their email and calendars.
Why they would put a mailbox on state departments servers and set a forward is so Clinton and her staff are listed in the state department's directory or the more accurate term is Global Address List(or GAL for short).
You can do that a couple of other ways as well, but the way I just described is very common. In a case like I described above that both address would show up on the emails in the header information. And Huma Abedin did work for the state department under a special government employee arrangement. And she's Clintons right hand woman -- she most certainly had a mailbox on Clintons private server as well. So those state.gov + HRC's personal server emails could very well be soley to/from Abedin and not involve Clinton at all(in theory).
Again, not taking any sides here. Just email is my profession and I do have quite a bit of experience with it including in government and dealing with both unclassifed and classified emails.