With the CIA leak investigation nearing an end, President Bush (search) on Monday declined to say whether he would remove an aide under indictment.

"There's a serious investigation," the president said. "I'm not going to prejudge the outcome of the investigation." He commented in response to reporters' questions during a meeting with Bulgaria's president, Georgi Parvanov.

Two of Bush's aides, Karl Rove (search) and I. Lewis Libby, have been questioned by a grand jury about their conversations with reporters about CIA operative Valerie Plame. The identities of those who disclosed Plame's name are vital pieces of evidence for Special Counsel Patrick Fitzgerald as he tries to track down leakers in the Bush administration.

New York Times reporter Judith Miller (search) says she told a federal grand jury she could not recall where she heard name of the covert CIA officer whose cover was blown, even though she jotted it down in her notebook.

Miller wrote down "Valerie Flame."

"I told Mr. Fitzgerald, I simply could not recall where that came from, when I wrote it or why the name was misspelled," Miller said in a first-person account for her newspaper published Sunday.

Fitzgerald has been gathering evidence on conversations between Libby, vice presidential chief of staff, and Miller.

Miller spent 85 days in jail for refusing to disclose her source for Plame's identity but has since made two recent grand jury appearances about her discussions with Libby concerning Bush administration critic Joseph Wilson, Plame's husband.

Plame's name was exposed eight days after Wilson said the administration had manipulated prewar intelligence on Iraqi weapons programs.

"I testified that I did not believe the name came from Mr. Libby, in part because the notation does not appear in the same part of my notebook as the interview notes from him," Miller wrote in the Times. "Mr. Fitzgerald asked if I could recall discussing the Wilson-Plame connection with other sources. I said I had, though I could not recall any by name or when those conversations occurred."

Miller also wrote down Plame's name in her notes as "Victoria Wilson."

"I told Mr. Fitzgerald that I was not sure whether Mr. Libby had used this name or whether I just made a mistake in writing it on my own," Miller recalled. "Another possibility, I said, is that I gave Mr. Libby the wrong name on purpose to see whether he would correct me and confirm her identity.

"I also told the grand jury I thought it was odd that I had written `Wilson' because my memory is that I had heard her referred to only as Plame. Mr. Fitzgerald asked whether this suggested that Mr. Libby had given me the name Wilson. I told him I didn't know and didn't want to guess."

Miller's lack of recollection is hardly unusual.

The Iran-Contra controversy featured a White House military aide, Oliver North, who testified that he was unable to recall key events about the arms-for-hostages deals with Iran and the covert arming of guerrilla forces fighting the leftist government of Nicaragua.

First lady Hillary Rodham Clinton was unable to recall much of anything about work that she and her law firm had done on long-ago Whitewater land deals in Arkansas. The deals turned out to be fraudulent and sent some of her business partners to prison.

Miller is in a different position than her predecessors in Washington controversy. She is a witness in the investigation, not under scrutiny herself.