Appearing Sunday on CBS' "Face the Nation," Gonzales was asked whether he told chief of staff Andrew Card a federal prosecutor was investigating the disclosure of a CIA agent's identity 12 hours before notifying the rest of the White House staff.
Gonzales -- who was White House Counsel at the time -- said he told Card about the investigation the night he was notified about it. He said he waited until the next morning to notify President Bush and the rest of the White House staff.
U.S. Sen. Joe Biden, D-Del., said on the same program Gonzales' answers raised more issues in the controversy.
"There's been a real inertia at the White House to look into this to begin with, number one," Biden said. "Number two, the real question now is who did the chief of staff speak to?"
A federal grand jury is investigating whether any crimes were committed when the identity of Valerie Plame was disclosed to reporters.