He led the N.R.A. and, for 29 years, the American Conservative Union, which organizes the influential annual Conservative Political Action Conference, or CPAC. He was also a columnist.

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

Alexander Butterfield, the former White House aide who revealed the existence of damaging recordings related to the break-in ...

Alexander Butterfield, the former White House aide whose testimony revealed the existence of President Richard Nixon’s secret ...

Alexander Butterfield, a former top aide to President Richard Nixon whose disclosure of a secret taping system in the White ...

Alexander Butterfield, the Richard Nixon White House aide who uncovered the Watergate tapes, died at the age of 99.

WASHINGTON (AP) — 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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Richard Nixon - Bettmann/Getty Images There were a lot of tricky things about Richard Nixon. The 37th President of the United ...