Courtesy of Shorpy, The 100-Year-Old Photo Blog.
The Great Gesticulator. September 1, 1924. “Robert M. La Follette, first radio campaign speech.” Republican senator from Wisconsin and Progressive Party presidential candidate “Fighting Bob” La Follette, who died less than a year after this picture was taken. National Photo Company Collection glass negative.
Thanks to cousin Bond for sending me to this site and highlighting the Jazz Cats from 1925.