The House Judiciary Committee issued a subpoena for testimony and documents from Miers, while the Senate panel demanded the same from Taylor. Both committees also issued separate subpoenas for White House documents related to the dismissals.

"By refusing to cooperate with congressional committees, the White House continues its pattern of confrontation over cooperation," said Sen. Patrick J. Leahy (D-Vt.), chairman of the Senate panel. "The White House cannot have it both ways--it cannot stonewall congressional investigations by refusing to provide documents and witnesses while claiming nothing improper occurred."