The master list of Nixon political opponents was a secret list compiled by President Richard Nixon's Presidential Counselor Charles Colson. It was an expansion of the original Nixon's Enemies List of 20 key people considered opponents of President Richard Nixon. In total, the expanded list contained 220 people or organizations. The purpose of the list was to "use the available Federal machinery to screw [their] political enemies." One such scheme involved using the Internal Revenue Service to harass people on the list.