Alexander Butterfield, the former White House aide whose testimony revealed the existence of President Richard Nixon’s secret taping system and changed the course of American history, has died. The 99 ...

Alexander Butterfield, the White House aide who inadvertently hastened Richard Nixon's resignation over the Watergate scandal when he revealed that the president had bugged the Oval Office and Cabinet ...

Alexander P. Butterfield, who disclosed to the U.S. Senate and to a stunned nation the existence of Richard Nixon’s White House taping system, blowing the cover on the Watergate conspiracy and sealing ...

Alexander Porter Butterfield, the former aide to President Richard Nixon who disclosed to the U.S. Senate the existence of Nixon's White House taping system, resulting in the Watergate conspiracy's ...

Butterfield disclosed then-President Richard M. Nixon had a recording system in the Oval Office Alexander Butterfield, the former White House aide who revealed the existence of damaging recordings ...

FILE - Alexander Butterfield, former deputy assistant to President Nixon, speaks during the Presidential Tapes Conference at the John F. Kennedy Library and Museum in Boston, Feb. 16, 2003.

Alexander Butterfield, a White House aide whose testimony before Congress during the Watergate scandal revealed the existence of President Richard Nixon’s secret taping system, died on Monday. He was ...