I don't remember the last time I recommended a movie, but I have one for you tonight. I found it to be a refreshing political documentary of hope. I won't say much more about it other than, "It inspired me." and "You should watch it."
You should check out "Can Mr. Smith Get to Washington Anymore?". It is a great piece of film that kept me interested from beginning to end. You can see the official movie site here. I really enjoyed this one, I hope you do too.