It is dangerous for a national candidate to say things that people might remember.
Source, in full
From “Ten Commandments for New Hill Members,” in The Washington Post (4 January 1981), as cited in The Official Rules: 5,427 Laws, Principles and Axioms to Help You Cope With Crises, Deadlines, Bad Luck, Rude Behavior, Red Tape and Attacks by Inanimate Objects, Paul Dickson, Courier Corporation (2013), p. 223