Slogan unveiled by then-food administrator Hoover on 29 September 1917, reported in the NY Times 1 October 1917, p. 15.
Herbert Hoover: Zitate auf Englisch
“Every collectivist revolution rides in on a Trojan horse of 'emergency.'”
It was the tactic of Lenin, Hitler, and Mussolini. In the collectivist sweep over a dozen minor countries of Europe, it was the cry of men striving to get on horseback. And 'emergency' became the justification of the subsequent steps. This technique of creating emergency is the greatest achievement that demagoguery attains... The invasion of New Deal Collectivism was introduced by this same Trojan horse.
p. 357
The Memoirs of Herbert Hoover: The Great Depression, 1929-1941 (1952)
“Radio Address to the Nation on Unemployment Relief,” American Presidency Project, October 18, 1931