Campaign remark, Fresno, Cal., 10 Sept. 1952. John F. Parker, in "If Elected, I Promise ...": Stories and Gems of Wisdom by and About Politicians (1969), attributes the reverse statement to Chauncey Depew (1834 - 1928): "If you will refrain from telling any lies about the Republican party, I'll promise not to tell the truth about the Democrats."
William Wycherley (1964). “Miscellany poems concluded. Miscellaneous poems published from more correct copies. Hero and Leander in burlesque. The posthumous works”