Alexander Butterfield, Who Revealed Nixon Tapes in Watergate Scandal, Dies at 99

“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.Alexander P. Butterfield testifying before the Senate Watergate Committee in July 1973. He revealed to the American public the existence of a secret recording system that President Richard M. Nixon had authorized and that had picked up virtually all of his meetings and telephone conversations.