The law system of the United States is the reason why things work the way they do in the country. Laws are the boundaries that maintain the balance within the nation, and in the case of the United States, each state is plenary sovereigns, as the country is under a Federal government.
The constitutional laws, treaties, administrative regulations, statutory law, and the common law, all represent derivations that conform the law system. Complex as it is, these sources and rules set the foundations for a stable society. However, there are still breaches in the law that harm this balance terribly, being the public corruption one of these.