Government is a group of people that governs a community or unit.It sets and administers public policy and exercises executive, political and sovereign power through customs, institutions, and laws within a state.
The Judicial branch oversees the court system of the U.S. Through court cases, the judicial branch explains the meaning of the Constitution and laws passed by Congress.
Federalism allows people living in different states with different needs and different interests to set policies suited to the people in their state, yet still come together with other states as one nation.