Vincent St. John

Vincent St. John was a founder and prominent member of the Industrial Workers of the World (IWW or the Wobblies). Clarence Darrow defended St. John after he and 100 others including Big Bill Haywood were convicted for violating the Espionage Act. President Warren G. Harding freed St. John from federal prison in 1923.
Photo from: http://en.wikipedia.org/wiki/Vincent_Saint_John