In 1938, Alinsky gave up his last employment at the Institute for Juvenile Research, University of Illinois at Chicago, to devote himself full-time as a political activist. In his free time he had been raising funds for the International Brigade (organized by the Communist International) in the Spanish Civil War and for Southern Sharecroppers, organizing for the Newspaper Guild and other fledgling unions, fighting evictions and agitating for public housing. He also began to work alongside the CIO (Congress of Industrial Organizations) and its president John L. Lewis. (In an "un-authorized biography" of the labor leader Alinsky wrote that he later mediated between Lewis and President Franklin D. Roosevelt in the White House).