The Wikipedia article is interesting
http://en.wikipedia.org/wiki/Mr._Smith_Goes_to_Washington
- Early critics complained that the film was "anti-American and pro-Communist" but it was banned by the Nazis, the Communists and Franco's Spanish dictatorship. It was the last American film shown in France before the Nazi occupiers banned American films and then was shown in defiance of the ban.
- It was supposed to be a sequel to Mr Deeds goes to Town and was to star Gary Cooper but Cooper was unavailable so they re-tooled it for Jimmy Stewart as Jefferson Smith. I'm glad we have both Cooper's Mr. Deeds and Stewart's Mr. Smith. If both had been the same, we'd have been poorer for it.
- The political backlash from the film may have led to the break-up of the linear monopoly represented by the studios and the threater owners who created them a decade later. There might have been a "revenge" motive there.