Don't think she's done but she did not come across as Presidential. I don't think there is much in the way of damaging legal issues here. But this was a chance for someone who has been laying low for some time to come out and not only rally but energize some on her side. She came across as shaky and not engaged. She could not look at the crowd for more than a glimpse. Her replies were so condensed there was nothing to feel confidence in her. This was her opportunity to command the stage and I don't think she achieved that. Why I don't think it completely kills her - after Obama, people had the charismatic, charming, soothing and inspiring orator completely tank as President - or to make you on the Left feel better, he did not live up to the billing. So no one is looking for a smoothing talking woman by any means. And discussing servers and emails and internet security from hacking is not exactly her forte. Put her in a discussion on some issues she knows something about and she comes across better.
We will see how long this goes on. Republicans need to find a smoking gun quickly or just move on. She'll give them plenty to work with but harping on this if nothing pans out just plays into the Clinton game.