Alexander Butterfield oversaw the installation and operation of a voice-activated recording system in the Nixon White House ...

Butterfield served as a deputy assistant to Nixon from 1969 to 1973 ...

Alexander Butterfield, a former top aide to President Richard Nixon whose disclosure of a secret taping system in the White House dramatically shaped the Watergate scandal, ultimately leading to Nixon ...

There is tape in the Oval Office,” said Mr. Butterfield, a former White House aide, in testimony that rocked the Watergate hearings and led to the president’s resignation.