"Senate Judiciary Committee authorizes subpoenas."
The Senate Judiciary Committee, following the House’s lead, has “authorized subpoenas for White House political adviser Karl Rove and other top aides involved in the firing of federal prosecutors. … 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.”
UPDATE: Sen. Patrick Leahy (D-VT) announced that ex-Gonzales chief-of-staff Kyle Sampson plans to testify voluntarily next Thursday.