"Ms. Miers has absolute immunity from compelled congressional testimony as to matters occurring while she was a senior adviser to the president," White House Counsel Fred Fielding wrote in a letter to Miers' lawyer, George T. Manning.
Manning, in turn, notified committee chairman John Conyers, D-Mich., that Miers would not show up Thursday to answer questions about the White House role in the firings of eight federal prosecutors over the winter.
Conyers, who had previously said he would consider pursuing criminal contempt citations against anyone who defied his committee' subpoenas, revealed the letters after former White House political director Sara Taylor testified Wednesday before the Senate Judiciary Committee.
Taylor said she knew of no involvement by the president in the firings of the U.S. attorneys.
She irked senators by refusing to answer many questions from a panel investigating whether the firings were politically motivated. She said she was bound by Bush's position that White House conversations were protected by executive privilege.
Conyers said of Miers, Bush's former White House lawyer, "As a former public official and officer of the court, Ms. Miers should be especially aware of the need to respect legal process, and we expect her to appear before the committee tomorrow as scheduled."
Fielding said the Justice Department had advised the White House that Miers had absolute immunity from compelled congressional testimony.
"The president has directed her not to appear at the House Judiciary Committee hearing on Thursday, July 12, 2007," Fielding wrote.