My understanding is that the staffs keep their bosses informed about the volume and tone of constituent feedback; if many people are calling in with similar vie

My understanding is that the staffs keep their bosses informed about the volume and tone of constituent feedback; if many people are calling in with similar views on an issue, the congressperson will do whatever the constituents want. Being a big donor, or even better, a representative of big donors means that you can influence the congressperson when there is no strong public sentiment, or if you have a very strong policy point.