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Apparently the Valerie Plame investigation is moving forward, though there's been precious little said about it publicly. All hail Dana Milbank at the Post for hanging onto this. Lots of good stuff in the story. Some highlights:

The Justice Department has added a fourth prosecutor to the team investigating the leak of an undercover CIA officer's identity, while the FBI has said a grand jury may be called to take testimony from administration officials, sources close to the case said.

According to administration officials and people familiar with some of the interviews, FBI agents apparently started their White House questioning with top figures -- including President Bush's senior adviser, Karl Rove -- and then worked down to more junior officials. The agents appear to have a great deal of information and have constructed detailed chronologies of various officials' possible tie to the leak, people familiar with the questioning said.

But sources said the CIA believes that people in the administration continue to release classified information to damage the figures at the center of the controversy, former ambassador Joseph C. Wilson IV and his wife, Valerie Plame, who was exposed as a CIA officer by unidentified senior administration officials for a July 14 column by Robert D. Novak.

"The only fear I've heard expressed is that the investigation will be too slow or too fast and will kick into a visible mode in a way that is poorly timed for the election," the Republican [legal source] said. "If they prosecuted someone tomorrow, I don't think the White House would care. And they can do it in December 2004. They just don't want it to become an issue in the election. [emphasis mine]"

Is Bush really concerned about this, or is it just about the election? What's the difference?