Money in politics is by far the biggest political issue, I'd say. It's the root cause of most evil in Congress. It's also the reason why Congress has so low approval rating (because they aren't listening to the People, but their few donors), and why they are so useless in terms of collaborating with each other, too.
How can they collaborate for the "good of the people", when they come from a position of having to pass new legislation to protect the interests of their donors one way or another. When you look at it from this point of view, you realize why so many refuse to compromise on their positions. Maybe they could compromise on ideology a bit, especially if some solution seems to be getting the consensus approval, but it's a lot harder to compromise on what your donors want, and you have to deliver on their wishes if you want to keep the money coming to your re-election.
How can they collaborate for the "good of the people", when they come from a position of having to pass new legislation to protect the interests of their donors one way or another. When you look at it from this point of view, you realize why so many refuse to compromise on their positions. Maybe they could compromise on ideology a bit, especially if some solution seems to be getting the consensus approval, but it's a lot harder to compromise on what your donors want, and you have to deliver on their wishes if you want to keep the money coming to your re-election.