Former Attorney General John Ashcroft and ex-CIA Director George Tenet are among the Bush administration officials who refused to be interviewed for a government report on the warrantless wiretapping program.
The Bush-era program conducted electronic surveillance on calls and e-mails within the U.S. -- without a judge knowing about it or giving the OK.
An unclassified summary of the report says the other officials who declined interviews are Bush's ex-chief of staff, Andrew Card; Dick Cheney's former top aide David Addington; and former top Justice Department lawyer John Yoo.
Congress last year told internal watchdogs at several agencies to report on the surveillance program.