Senator: CIA illegally searched lawmaker computer network
"I view the acting counsel general's referral as a potential effort to intimidate this staff, and I am not taking it lightly," she said.
Sen. Saxby Chambliss of Georgia, the top Republican on the Intelligence Committee, said he disagreed with Feinstein on the dispute, without fully specifying. He called for a study "on what happened so people can find out what the facts are."
"Right now we don't know what the facts are," Chambliss told reporters. "We're going to continue to deal with this internally."
Brennan, who was questioned at an appearance on another subject, said "We are not in any way, shape or form trying to thwart this report."
"I am confident that the authorities will deal with this appropriately," he said. "I would just encourage some members of the Senate to take their time, to make sure they don't overstate what they claim and what they apparently believe to be the truth."
Democrats on the Senate Intelligence Committee completed their 6,300-page interrogation report last year and are revising it with CIA comments. Feinstein said she would ask the White House to declassify its 300-plus-page executive summary, and its conclusions.
When the report was first approved by Democrats on the committee in December 2012, Feinstein said her staffers came to the conclusion that the detention and interrogation program yielded little or no significant intelligence.
Associated Press writer Bradley Klapper contributed to this report.