Maybe Petraeus looked at the names being mentioned for the Democratic nomination in 2016, decided it was a weak field, and sees this as a resume enhancer for 2016.
How sad it is that that is very possible.
He decided to self-confess ahead of time so the story can get out on his terms and in his words.
He knows if he tells the truth at the hearing, the administration will out him in the nastiest way afterwards.
In short, he pre-empted Obama and his den of blackmailers, thieves and extortioners by outing himself.
I wish all the Obama mafia would be indicted under the RICO conspiracy Act....and quickly before he takes our country down to ruin.
Leni