Everything to know about the special counsel investigation into the Trump campaign's Russia ties

Director Mueller, along with Deputy Attorney General James B. Comey, threatened to resign from office in March 2004 if the White House overruled a Department of Justice finding that domestic wiretapping without a court warrant was unconstitutional.[16] Attorney General John D. Ashcroft denied his consent to attempts by White House Chief of Staff Andrew Card and White House Counsel Alberto R. Gonzales to waive the Justice Department ruling and permit the domestic warrantless eavesdropping program to proceed. On March 12, 2004, President George W. Bush gave his support to changes in the program sufficient to satisfy the concerns of Mueller, Ashcroft and Comey.