That may surprise people here. The Republicans have done a good job painting her as the quintessential ultra-liberal Democrat, but really she is no such thing. She is, in fact, from the right wing of the party and could have been an establishment Republican a generation ago. She is widely reviled by the left over her vote on the Iraq War Authorization of Military Force (although to be fair, Joe Biden voted for it too and he's seen as generally reliable on liberal issues, as long as he doesn't open his mouth).
On the other hand she's the first really plausible female presidential candidate for a major party, and I think a lot of people who want to see that milestone project a great deal of their hopes on her. But what makes her plausible in the first place is her acceptability to the establishment.
And what makes her acceptable to the establishment is her competence and personal accomplishments; being married to Bill helps. But the Ivy League education, experience in high profile NGOs and partnership in a major law firm mean she's seen as serious by "serious people". But in this case that should be held against her here. She's not like old Uncle Joe (Biden), whose heart is in the right place but who the hell can tell where his mind might go a-wandering; Hillary is someone you expect to have her head in the game. She knew damn well that conducting official business on non-government servers is exactly what people do when they're breaking the law.
I'm neither a Hillary partisan nor a Hillary hater. On the political spectrum I tend to fall a little to the right of the most vocal Democratic base and to the left of the establishment "DLC" wing that dominates the party at the national level. When the Secretary of State does something this fishy, that's a big deal. I think there should be something like a special prosecutor appointed, even though when the words "Clinton" and "special prosecutor" are uttered in the sentence the word "circus" can't be far behind. But then if the special prosecutor finds no indictable offense I'd be happy with that result.