The Senate Judiciary Committee decided by voice vote to approve the subpoenas as Republicans and Democrats sparred over whether to press a showdown with President Bush over the ousters of eight U.S. attorneys.
Democrats angrily rejected Bush's offer to grant a limited number of lawmakers private interviews with the aides with no transcript and without swearing them in. Republicans counseled restraint.
A House Judiciary subcommittee authorized subpoenas in the matter Wednesday, but none has been issued.
Democrats said the move would give them more bargaining power in negotiating with the White House to hear from Bush's closest advisers.
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