The first detention facility at Guantanamo, Camp X-Ray, which opened in 2002, has been replaced by more formal buildings and a cost structure that consumed $445 million in the past year. Charles Dharapak AP
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Rep. Jim Clyburn, the House assistant democratic leader and South Carolina’s only Democrat in Congress, said it was not clear yet whether the plan would affect South Carolina.

“I would wait to see what the president does,” he said when asked about Obama’s proposal on an unrelated call with reporters about the Democratic primary. “If he proposes something that would have an impact on South Carolina, I’ll have something to say. But don’t think I ought to be getting out in front of the president on that or anything else.”

Obama said in his remarks that the United States would save $85 million a year in the cost of holding the detainees. The government spent $445 million last year at Guantánamo.

Among 91 detainees at the prison on a U.S. base in Cuba, 35 are eligible for transfer and 10 are in various phases of military commission hearings, the president said. The government will accelerate reviews for the rest to determine whether they can be transferred.

779 Number of detainees who have been held at Guantánamo for varying amounts of time. President George W. Bush released 532 to other countries, while Obama said he had sent 147 abroad.

The first alleged terrorists were taken to the Guantánamo detention center in January 2002, exactly four months after the Sept. 11, 2001, attacks in New York and Washington, which killed almost 3,000 people.

Khalid Sheikh Mohammed, the alleged mastermind of the 9/11 attacks, and four of his suspected plotters have been engaged in pretrial hearings for a decade before a military commission judge at Guantánamo. Their trail is still years away from starting because of hundreds of motions filed by their attorneys.

Two of them were at the war court Tuesday for pretrial hearings on defense attorneys’ access to evidence from the CIA “black” sites where they were held for three to four years.

Vera Bergengruen: 202-383-6036, @verambergen