Mr. Smith goes to Washington

The militant idealism of a naive, sincere man, whom parliamentary masterminds believe to be a compliant stooge, cleanses the American Senate of corruption and racketeering.
The film was a great success with critics and audiences in 1939, but earned furious protests from politicians.
Ranked 5th in the American Film Institute's "List of the 100 most inspiring American films of all time".
Oscar for Lewis R. Foster in the "Best Original Story" category and ten further nominations.
"Capra's famous social satire, which champions democracy and the freedom of the individual, is particularly convincing thanks to its successful mixture of humor and seriousness as well as its outstanding acting." (Encyclopedia of International Film)