"I'm reserving judgment on that, until we finish the inquiry," Sen. Arlen Specter, R-Pa., ranking GOP member of the Senate Judiciary Committee, on "Fox News Sunday."

"I think it's highly unlikely he survives," remarked Sen. Charles Schumer, D-N.Y., during an interview with NBC's "Meet the Press." "I wouldn't be surprised if a week from now, he's no longer attorney general. … Instead of just being the president's lawyer who rubber stamps everything the White House wants, he has a role as attorney general as the chief law enforcement officer of the land without fear or favor."

On Monday, the Justice Department is expected to release more documents detailing the role Gonzales, Justice Department officials and the White House played in the firings.

On Tuesday, the White House is expected to announce whether it will allow former White House counsel Harriet Miers and Deputy Chief of Staff Karl Rove to testify before Congress.

If they don't, the chairman of the Senate Judiciary committee promises subpoenas.

"I want testimony under oath," Sen. Patrick Leahy, D-Vt., said on "This Week." "I am sick and tired of getting half-truths on this."

U.S. attorneys serve at the pleasure of the president. But the Bush administration got itself into trouble by claiming the dismissals were solely performance-related. The White House did not disclose its own involvement until e-mails surfaced suggesting political loyalty may have played a role.