The phone is possibly more damaging to security, but it's not illegal as far as I read. So stupid and arrogant. But not illegal.
You can contrast this with the Republican attitude to Gen Patreaus, who intentionally gave classified information to his girlfriend and who was vigorously defended by the political right.
Can we just have a do-over of 2016 with both of them in prison before the primaries? I'd subscribe to that alternate reality.
I keep hearing the chants of "Lock her up" but no one has pointed out any conclusive evidence that HRC should be jailed. See above for the arguments about the email server. As for Benghazi, multiple investigations by some of the most relentlessly aggressive Republicans failed to find any wrongdoing even worth charging her for.
So, why put her in jail? Because you don't like her?