it would be just politics if she hadn't complained as a candidate that Bush was hiding things by using private email.
Clinton 2007 : You know our Constitution is being shredded. We know about the secret wiretaps, about the secret military tribunals, we know about the secret White House email accounts.
Then she does the same thing. That's not partisan politics, that's being a hypocrite.
As for the RDP it could very well have been a redirect to another machine at the house and not the actual email server. It's on the same network but it may not have been the email server itself, unless the router config or network setup has been published.