In case you've forgotten, what took Benghazi from "a thing Republicans keep whining about" to "Scandal!!!" was when some emails bouncing around between the White House, the CIA, and the State Department were passed to Jonathan Karl of ABC last Friday. The strange thing about it was that the emails didn't contain anything particularly shocking—no crimes admitted, no malfeasance revealed. It showed 12 different versions of talking points as everybody edited them, but why this made it a "scandal" no one bothered to say. My best explanation is that just the fact of obtaining previously hidden information, regardless of its content, is so exciting to reporters that they just ran with it. They're forever trying to get a glimpse behind the curtain, and when they do, they almost inevitably shout "Aha!" no matter what.
But then the problem comes. The White House decided to release a whole batch of emails related to the subject, and when they were examined, it turns out that what was given to Karl had been altered. Altered by whom, you ask? Altered by Karl's source: Republican staffers on the House Oversight Committee, which had been given the emails by the White House (CBS's Major Garrett confirmed this yesterday).
Let me just explain quickly in case you haven't been following this, and then we'll discuss what it means.