This was originally a short story by David Brin.
What am I doing blogging about the USPS again? Pumpkin’s plan to destroy the postal service is the plan to end American democracy. That’s not hyperbole. This is it. If we’re about to become a fascist dictatorship with only a veneer of pretend elections (looking at Belarus as just one example among many), it’s coming down to just this. Let him get away with dynamiting the postal service, and it’s Game Over. Stop him, and we have a chance.
By the way, they did make that movie… here’s a trailer.
I have not seen the movie, but I very much enjoyed the story. So there’s my recommendation: read.