Comey: Sorry But The Petraeus Case Was Very Different From Clinton Email Case

...While Republican critics and outside observers have widely compared the cases of Clinton and Petraeus, who pleaded guilty to criminal charges arising from sharing classified info with his mistress/biographer, Comey was having none of it, saying the Petraeus case was one that was appropriate to recommend for charges, and Clinton's was not.

 "The Petraeus case, to my mind, illustrates perfectly the kind of cases the Department of Justice is willing to prosecute," he said. "Even there, they prosecuted him for a misdemeanor. In that case, you had had vast quantities of highly classified information, including special sensitive compartmented information. That's the reference to code words. Vast quantity, not only shared with someone without authority to have it, ...and then he lied about it during the investigation."...
http://talkingpointsmemo.com/livewire/comey-petraeus-clinton-classified-info