This saying comes from an article written in 1937 by H.L. Mencken, a famous American journalist. In this article, he said that although Pittsburgh had many other ethnic groups, it had too much support for Franklin D. Roosevelt in his presidential campaign to be considered truly representative of America at that time. Therefore, he concluded that Pittsburgh was really a city full of blacks and Jews. Mencken's description of Pittsburgh has become popular enough to be used as a metaphor for cities where Jews are a small minority group. Even though there are more Hispanics than Jews in Pennsylvania, no one calls Pittsburgh a "city of whites and Hispanics."