Wretchard, in the comments:

 "What jumps out of the account is that Petraeus didn’t see it coming. He didn’t think it was a big deal. He had fixed the problem, talked to Broadwell. The other woman wasn’t going to press charges. She was a family friend. There was no crime — if we leave aside adultery. It was family court business. Maybe not even that if no one was going to make an issue of it.
And then he gets called after election day, and boom he gets called to carpet. How do you like that? I for one, don’t like it. Most workplaces you can tell if your being measured for a termination notice.
It strongly suggests is that Petraeus isn’t a problem with something that has happened. He’s a problem with something that is going to happen. There’s some loop Petraeus is not part of. Something he’s in the way of.
Well let a hundred flowers bloom! Let a thousand schools of thought contend!"