Frost: By definition.
Nixon: Exactly. Exactly. If the president, for example, approves something because of the national security, or in this case because of a threat to internal peace and order of significant magnitude, then the president's decision in that instance is one that enables those who carry it out, to carry it out without violating a law. Otherwise they're in an impossible position.
Frost: So, that in other words, really you were saying in that answer, really, between the burglary and murder, again, there's no subtle way to say that there was murder of a dissenter in this country because I don't know any evidence to that effect at all. But, the point is: just the dividing line, is that in fact, the dividing line is the president's judgment?
Nixon: Yes, and the dividing line and just so that one does not get the impression that a president can run amok in this country and get away with it, we have to have in mind that a president has to come up before the electorate. We also have to have in mind, that a president has to get appropriations from the Congress. We have to have in mind, for example, that as far as the CIA's covert operations are concerned, as far as the FBI's covert operations are concerned, through the years, they have been disclosed on a very, very limited basis to trusted members of Congress. I don't know whether it can be done today or not.
Nixon's views on presidential power: excerpt from an interview with David Frost
Today in 1974, President Richard Nixon resigned from office, the first US president to do so.