Hillary Clinton is a felon. There is now no question about that. That doesn't mean she's guaranteed to be charged or even convicted, since you still have to allow for the corruption and politicization of the justice system, unfortunately.
But no serious person can argue she is not guilty of a felony after the e-mail the State Department released (with great reluctance, I'm sure) late last night. In it, she is talking with her then-deputy chief of staff Jake Sullivan, who is supposed to be getting her some talking points about something, and she's growing impatient waiting for them. Sullivan explains that whoever has the talking points are trying to send them via secure fax - a sure tip-off that they contain classified information, as that's the only reason you would need to send them that way - and that they're having trouble with this and are working on the problem.