Columbia subject headings:
Executive power--United States.
Pardon--United States.
Presidents--United States.
United States. Executive Office of the President.
Harvard subject headings:
Executive power--United States
Pardon--United States.
Presidents--United States
United States. Executive Office of the President.
Princeton subject headings:
Executive power--United States.
Pardon--United States.
Presidents--United States.
United States. Executive Office of the President