Leahy: 'Time is up' for White House to produce surveillance opinions

Vice President Dick Cheney's office has in its possession more than 50 documents related to a congressional investigation of the Bush administration's warrantless wiretapping program, but Cheney's lawyer on Monday refused to hand over the documents in response to a subpoena.

In a letter sent to Senate Judiciary Committee Chairman Patrick Leahy (D-VT), the vice president's lawyer, Shannen W. Coffin, identified dozens of presidential authorizations of the program and Justice Department memos on its legal justifications in Cheney's possession. Coffin refused to hand over the documents, citing a president's right to keep deliberations with his advisers private.

"The Office of the Vice President possesses copies of documents ... that we understand to be of the most interest to the Committee and with respect to which a claim of Executive Privilege if made would clearly be valid," Coffin wrote in the letter Leahy released to reporters Monday.

Among the documents are "copies of Top Secret/Codeword Presidential Authorizations" issued between Oct. 4, 2001, and Dec. 8, 2006. President Bush approved the warrantless wiretapping program, which allows the National Security Agency to eavesdrop on foreign calls without prior court approval, in response to the Sept. 11 attacks. He was required to issue reauthorizations every 45 days.