On other terrorism issues, Mr. Obama suggested in the interview that his approach might be more measured. He said the closing of the detention center at Guantánamo Bay, Cuba, which once seemed to be an early top objective, was not likely to happen during the first 100 days of his administration.

“It is more difficult than I think a lot of people realize,” Mr. Obama said, “and we are going to get it done. But part of the challenge that you have is that you have a bunch of folks that have been detained, many of whom who may be very dangerous, who have not been put on trial or have not gone through some adjudication.”

Mr. Obama has in the past condemned waterboarding, and he was explicit in the interview that he regarded the use of the technique, in which a subject is made to believe that he is drowning, as torture, prohibited by statute. And the president-elect said he disagreed with Vice President Dick Cheney, who has defended the practice.

“Vice President Cheney, I think, continues to defend what he calls extraordinary measures or procedures when it comes to interrogations,” Mr. Obama said, “and from my view, waterboarding is torture.”

Mr. Obama’s choice for attorney general, Eric H. Holder Jr., is widely expected to be asked about his views on these issues at his confirmation hearing this week. Associates say Mr. Holder is open to prosecutions based on specific accusations but is less eager to use the criminal law to commence wide-ranging inquiries. Before being chosen for the Obama cabinet, he said there should be “a reckoning” over Bush administration policies.

Lawyers who represented Bush administration officials over the years expressed little surprise that Mr. Obama’s legal and national security team had lost whatever appetite it might have had for delving into alleged misdeeds of the Bush years.

“A new president doesn’t want to look vengeful,” said a former Bush White House lawyer, Bradford A. Berenson, who was a Harvard law classmate of Mr. Obama and has represented administration figures as a private lawyer, “and the last thing a new administration wants to do is spend its time and energy rehashing the perceived sins of the old one.