...David Petraeus with a straight face."

Easy - because they're fucking hypocrites.

Paul:  "I think there's going to be the problem that everything we complained about with Hillary Clinton revealing emails that were classified or not treating them appropriately are the same issues for Petraeus.  So I don't know how we can, with a straight face, say, 'Oh, we're going to appoint someone to a Cabinet position who actually pled guilty to a similar offense.'

I agree with you.

How would Petraeus even get a top secret clearance? Not sure how that works but it is utter hypocrisy to rip Hills for her national security document idiocy and not DP for his illegality.

No chance he would even be allowed in my white house, let alone get a top cabinet spot.

...by actually sticking to the topic of the OP.  

...of sticking it to Obama, showing that Petraeus is a "great man" who should never have been prosecuted.  Trump said of Petraeus: "(He) was really beyond reproach, there was nobody like him. And now he showed certain frailties, certain weaknesses. It can never be the same, but certainly he can make a comeback."

http://www.politico.com/story/2016/11/donald-trump-david-petraeus-231909

Trump could also be sympathetic to Petraeus because they share the same "frailties" and "weaknesses" - thinking with the little head.  That's also the difference between Petraeus and Hillary Clinton - He was thinking with his little head; she was thinking with her big, fat, crooked head.

i am sure Donald pulls these wondrous picks out of his pussy grabbing ass..