In a Friday afternoon bombshell, CIA Director David Petraeus resigned, citing an extramarital affair. Petraeus has been under fire recently for the CIA’s response to the Benghazi attack. The Cable’s Josh Rogin posted the letter of resignation:

Yesterday afternoon, I went to the White House and asked the President to be allowed, for personal reasons, to resign from my position as D/CIA.  After being married for over 37 years, I showed extremely poor judgment by engaging in an extramarital affair. Such behavior is unacceptable, both as a husband and as the leader of an organization such as ours. This afternoon, the President graciously accepted my resignation.

As I depart Langley, I want you to know that it has been the greatest of privileges to have served with you, the officers of our Nation’s Silent Service, a work force that is truly exceptional in every regard. Indeed, you did extraordinary work on a host of critical missions during my time as director, and I am deeply grateful to you for that.

Teddy Roosevelt once observed that life’s greatest gift is the opportunity to work hard at work worth doing. I will always treasure my opportunity to have done that with you and I will always regret the circumstances that brought that work with you to an end.

Thank you for your extraordinary service to our country, and best wishes for continued success in the important endeavors that lie ahead for our country and our Agency.

With admiration and appreciation,

David H. Petraeus

This is completely out of nowhere. Just last week, the New York Times published a fawning profile of Petraeus (which the administration cooperated with), clearly an attempt to boost his image as the Benghazi criticism heated up. Here is the final paragraph:

Mr. Petraeus’s future has inevitably been the subject of rumors: that he would be Mitt Romney’s running mate, or, more plausibly, that he was interested in the presidency of Princeton. In a statement in late September, he did not rule that out for the future, but said that for the time being he was “living the dream here at C.I.A.” That was before the recriminations this week over Benghazi.

The recriminations over Benghazi notably include charges that Petraeus misled lawmakers during a closed congressional hearing in September. Petraeus was scheduled to testify at another closed hearing before the House Intelligence Committee next week. He sure isn’t scheduled anymore. Did the timing of his resignation have anything to do with that?

One last question. Typically when an official resigns because of an affair, it’s because the information has already been made public or is about to be made public. So who had the dirt on Petraeus?