While the indictment of "Scooter" Libby, chief of staff to the Vice President and assistant to the President, is a monumental event inside Washington, could it be, as some Democrats have suggested, the tip of the iceberg? It already seems likely that if Libby's case goes to trial, Dick Cheney will be called on to testify under oath; other high ranking administration officials might have to as well. In fact, the AP's Mark Sherman takes a look at today's indictment and notes that a surprising number of cabinet members knew of CIA operative Valerie Plame's identity before it was leaked to the press.

At least seven Bush administration officials outside the CIA knew Valerie Plame was a CIA employee before the disclosure of her name in a column by Robert Novak in July 2003, according to the indictment Friday of I. Lewis "Scooter" Libby.

In no case other than Libby's does the indictment claim that one of the government employees provided the name to reporters. And the indictment does not identify anyone other than Libby.

But some are easy to determine. Of course, the "vice president of the United States" is Dick Cheney, for whom Libby worked as chief of staff. Cheney told Libby that Plame worked at the CIA, information that Libby understood came from the agency, the indictment said.

And the person referred to as "then White House press secretary" is Ari Fleischer. Libby discussed Plame's employment at the CIA with Fleischer, noting "that such information was not widely known," the indictment said.

Doing some stellar reporting, Sherman finds that others in the know included Under Secretary of State Marc Grossman, assistant to the vice president for public affairs Catherine Martin, and possibly Karl Rove.

The probe, as we noted earlier, will coninue with a new grand jury, though special prosecutor Patrick Fitzgerald has said that "the bulk of this investigation is over." Nevertheless, should the case indeed move to trial and the media devotes to it even a fraction of the time given to the trial of Scott Peterson or Michael Jackson, it's unclear how the White House would be able to successfully govern.