Alexander Butterfield, the White House aide who disclosed Richard Nixon's secret audio taping system, providing the "smoking gun" of the Watergate scandal that brought down the president, has died at ...

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.

The White House aide who revealed that Richard Nixon had secretly recorded his conversations as president has died. Alexander ...