The legendary 1947 memo that Clark Clifford, a White House counsellor, sent to Harry Truman (it may have had multiple authors) outlining what was then an improbable path to victory in the presidential election, simply lists all the pressure groups on the Democratic side—farmers, Jews, Negroes, organized labor, Southerners—and explains how to keep them all in your hand without having to discard any, as if playing political gin rummy, a favorite card game of the period.
