Trivia: The real-life inspiration for Jefferson Smith was Sen. Rush Holt (D-WV), elected in 1934. (His son, also named Rush, is currently a Congressman from New Jersey).
Trivia: The same actress that plays Jimmy Stewart's mother in Mr. Smith goes to Washington also plays his mother in It's a Wonderful Life. Frank Capra, the director of both movies, liked using the same actors and actresses if he liked their work.