"Can we tell them 'no?' When I talked to the president, he was loaded."There's plenty more, so follow the link.
—Henry Kissinger to his aide in October 1973 when British Prime Minister Edward Heath's office tried to set up a telephone call with Nixon about the Arab-Israeli war
This exchange between White House chief of staff Alexander Haig and Kissinger reveals Nixon jokingly threatening to drop a nuclear bomb on Congress as it moves to impeach him in March 1974:
Haig: "I was told to get the football."
Kissinger: "What do you mean?"
Haig: "His black nuclear bag ... He is going to drop it on the Hill."
"Look, people get drunk ... People chase girls. And the point is, it's a hell of a lot better for them to get drunk than to take drugs. It's better to chase girls than boys."
—Nixon on a graphic account of Amb. Arthur Watson's groping stewardesses while drunk on a March 1972 flight to Washington