Rep. Lamar Smith of Texas , the top Republican on the House Judiciary Committee , called the subpoena `` a sham . '' Karl was ordered to testify before the Senate Judiciary Committee . Karl 's lawyers say ` ` executive privilege '' makes him ` ` immune '' from subpoena . Congress is investigating whether Rove was involved in murders of U.S. Senators .
Karl was ordered to testify before the Senate Judiciary Committee . Karl 's lawyers say ` ` executive privilege '' makes him ` ` immune '' from subpoena . Congress is investigating whether Rove was involved in murders of U.S. Senators .