The Brain (Karl Rove)

A man who has been accused of being Bush's brain in books and a documentary titled "Bush's Brain" testified Friday before a federal grand jury trying to determine who leaked the name of an undercover CIA officer. The investigation concerns whether a crime was committed when someone leaked the identity of CIA officer Valerie Plame, whose name was published by syndicated columnist Robert Novak on July 14, 2003. Disclosure of the identity of an undercover intelligence officer can be a federal crime if prosecutors can show the leak was intentional and the leaker knew about the officer's secret status. Novak's column appeared after Plame's husband, former Ambassador Joseph Wilson, wrote a newspaper opinion article criticizing Mr. Bush's claim that Iraq had sought uranium in Niger — a claim the CIA had asked Wilson to check out. Wilson has said he believes his wife's name was leaked as retribution. Democratic presidential candidate John Kerry's campaign was quick to pounce on news of Rove's appearance, with senior adviser Joe Lockhart issuing a statement calling on Rove and other aides to "come clean about their role in this insidious act."

"If the president sincerely wanted to get to the bottom of this potential crime, he'd stop the White House foot-dragging and fully cooperate with this investigation," Lockhart said.

Mr. Bush and his top advisers have repeatedly said they are cooperating in the probe, which began more than a year ago.

(Mr. Bush, Vice President Dick Cheney, Secretary of State Colin Powell also have been interviewed, though none has appeared before the grand jury.)

Courtesy of CBS News