Here are some ways that the political system in the United States could be reformed. These things would mostly be difficult to achieve, since the system is currently geared to retard change and progress by preserving existing power structures.
Only 5-10 incumbents lose their House seats every election cycle. That's about 1 or 2 percent of your representatives that get voted out of office. But wait, doesn't Congress have about a 10 to 14 percent approval rating? Shouldn't about 86 to 90 percent of our representatives be getting replaced every election year?
But there they stay, voted into office once, and going nowhere.
Your representatives do not have to worry about their performance while in office at all. They know that they will never get voted out of office unless they get involved in some sort of scandal. Please see the Wikipedia article about Congressional stagnation.
Now consider what can be done to solve the problems in our political system.
Shortest line districting
Mixed Member Proportional system
Switzerland is a Multi-party Federal Parliamentary Democratic Republic
Public funding for elections
Eliminate the Electoral College
Overturn Citizens United v. FEC
State convention to ratify Article the First of the Constitution