In 1929, Hoover waited until he’d been in office forty days before calling in his secretary of war. Hoover asked the secretary, “Do you know of anything particular going on in your sphere about which I should be informed?”
“Not a thing in the world, Mr. President,” the secretary answered.
And that was the last time the president and his secretary of war had occasion to get together.
Source: Jokes and Anecdotes, edited by Joe Claro, 1996 Random House, Inc.