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."
Jonathan Swift (1761). “The Works of Dr Jonathan Swift, Dean of St Patrick's, Dublin. Accurately Corrected by the Best Editions. With the Author's Life and Character; Notes Historical, Critical, and Explanatory; Tables of Contents, and Indexes. More Complete Than Any Preceding Edition. In Eight Volumes”, p.323