WASHINGTON (AP) – The White House dropped its contention Friday that former Counsel Harriet Miers first raised the idea of firing Federal prosecutors, blaming “hazy memories” as e-mails shed new light on Karl Rove’s role. Support eroded further for Attorney General Alberto Gonzales.

Presidential press secretary Tony Snow previously had asserted Miers was the person who came up with the idea, but he said Friday, “I don’t want to try to vouch for origination.” He said, “At this juncture, people have hazy memories.”

Mr. Snow’s comments came hours after the Justice Department released e-mails Thursday night pulling the White House deeper into an intensifying investigation into whether eight firings were a purge of prosecutors deemed unenthusiastic about presidential goals.

Mr. Snow said it was not immediately clear who first floated the more dramatic idea of firing all 93 U.S. attorneys shortly after President Bush was re-elected to a second term.

“This is as far as we can go: We know that Karl recollects Harriet having raised it and his recollection is that he dismissed it as not a good idea,” Mr. Snow told reporters. “That’s what we know. We don’t know motivations. … I don’t think it’s safe to go any further than that.”

Asked if Mr. Bush himself might have suggested the firings, Snow said, “Anything’s possible … but I don’t think so.” He said Mr. Bush “certainly has no recollection of any such thing. I can’t speak for the attorney general.”

“I want you to be clear here: Don’t be dropping it at the president’s door,” Mr. Snow said.

Mr. Bush’s top legal aide, Fred Fielding, was to tell congressional Democrats on Friday whether and under what conditions the White House would allow high-level officials, including Mr. Rove, to testify under oath in the inquiry into the firings.

Subpoenas could come as early as next week, when the Senate is expected to bring up a bill that would remove a provision in the Patriot Act that allows the attorney general to replace Federal prosecutors without Senate confirmation.

“The story keeps changing, which neither does them or the public any good,” Senator Schumer, Democrat of New York, said Friday. “They ought to gather all the facts and tell the public the truth.”

Meanwhile, a Republican House member suggested it might be time for Mr. Gonzales to go.

“It is ultimately the president’s decision, but perhaps it would benefit this administration if the attorney general was replaced with someone with a more professional focus rather than personal loyalty,” said Representative Dana Rohrabacher, Republican of California. He complained of “a pattern of arrogance in this administration.”

Republican Senator Sununu of New Hampshire has called for Mr. Bush to replace Mr. Gonzales, and a Republican member of the House Judiciary Committee, speaking on condition of anonymity, has said he plans to do the same next week.

Other GOP lawmakers have joined Democrats in harsh indictments of Mr. Gonzales’ effectiveness but have stopped short of saying he should be fired.

“I do not think the attorney general has served the president well, but it is up to the president to decide on General Gonzales’ continued tenure,” said Senator Collins, Republican of Maine.

The latest e-mails revealed between White House and Justice Department officials show that Mr. Rove inquired in early January 2005 about firing the prosecutors. They also indicate Mr. Gonzales was considering dismissing up to 20 percent of them in the weeks before he took over the Justice Department.

In one e-mail, Mr. Gonzales’ top aide, Kyle Sampson, said an across-the-board housecleaning “would certainly send ripples through the U.S. attorney community if we told folks they got one term only.” The e-mail concluded that “if Karl thinks there would be political will to do it, then so do I.”

Mr/ Sampson resigned this week amid the uproar.

The Senate Judiciary Committee has scheduled a vote for next Thursday on authorizing subpoenas for Mr. Rove, Ms. Miers and her deputy, William K. Kelley. The panel already has approved the use of subpoenas, if necessary, for Justice Department officials and J. Scott Jennings, a White House aide who works in Mr. Rove’s office.

E-mails between the White House and the Justice Department suggest that Jennings was involved in setting up a meeting on a possible replacement for soon-to-be-fired top federal prosecutor in New Mexico, David Iglesia,s and in responding to “a senator problem” with the proposed replacement of Bud Cummins, then the chief federal prsecutor for Arkansas.

Among the Justice Department officials named in the subpoenas is Associate Deputy Attorney General William E. Moschella. Lawmakers want him to testify about whether the White House consented to changing the Patriot Act last year to let the attorney general appoint federal proscutors without confirmation.

In an interview with The Associated Press this week, Mr. Moschella said the change was not aimed at bypassing the Senate but ending meddling by judges in filling vacant prosecutors’ jobs. Under the former law, federal judges could appoint interim prosecutors in jobs that were vacant for more than 120 days.

“There’s a conspiracy theory about this and it’s nothing other than that,” Mr. Moschella said.