From the NYT:
[Gonzales'] appearance underscored what two Republicans close to the Bush administration described as a growing rift between the White House and the attorney general. Mr. Gonzales has long been a confidant of the president but has aroused the ire of lawmakers of both parties on several issues, including the administration’s domestic eavesdropping program.
The two Republicans, who spoke anonymously so they could share private conversations with senior White House officials, said top aides to Mr. Bush, including Fred F. Fielding, the new White House counsel, were concerned that the controversy had so damaged Mr. Gonzales’s credibility that he would be unable to advance the White House agenda on national security matters, including terrorism prosecutions.
“I really think there’s a serious estrangement between the White House and Alberto now,” one of the Republicans said.