The story
First stated by Henry IV of France as, "I want there to be no peasant in my realm so poor that he will not have a chicken in his pot every Sunday," and later associated with United States president Herbert Hoover's 1928 campaign as part of an advertisement, placed by a local committee. Because of the advertisement, the phrase is often attributed to Hoover, although he never made such a statement.
Etymology from Wiktionary, CC BY-SA 4.0.