The term 'Fireside Chat Medium' refers to the medium of RADIO, which was used by President Franklin D. Roosevelt in the 1930s and 1940s to communicate directly with the American people. The term 'Fireside Chat' was coined by Roosevelt himself to describe his informal RADIO addresses, which were broadcast from the White House. Roosevelt's Fireside Chats were a way for him to explain his policies and programs to the public, and to provide comfort and reassurance during difficult times.