The Senate Judiciary Committee scheduled a daylong hearing for Gonzales' first appearance under oath since the firings set off an uproar in February that has only escalated with a bewildering series of conflicting accounts from the attorney general, his current and former aides and White House officials.

Gonzales himself has provided differing versions of the events, first saying he had almost no involvement in them and then later acknowledging that his role was larger, but only after e-mails about meetings he attended were released by the Justice Department to House and Senate committees.

Some Republicans acknowledge that merely sticking to the talking points in Gonzales' prepared testimony will make it hard for him to hang onto his job. The committee's senior Republican, Sen. Arlen Specter of Pennsylvania, dismissed the prepared remarks as "pablum."

Pablum

"he admitted the ousters were mishandled and that he had been 'less than precise with my words' when he first discussed them."