A great film. Peter Sellers is remarkably restrained in his portrayal. A great idea well executed.
Leonard Maltin/Plot synopsis:
A childlike man (Sellers) chances to meet important, powerful people who interpret his bewildered silence as brilliance. Low-keyed black humor, full of savagely witty comments on American life in the television age, but fatally overlong. Adapted by Jerzy Kosinski from his own story. Douglas won Oscar as political kingmaker.