Government is also classified based on the extent of powers exercised by the central or national Government:
There are two (2) classifications of this form of governments:
Unitary Government – one in which the control of national and local affairs is exercised by the central or national government. Examples: Philippines, France, Japan, etc.
Federal Government – one in which the power of government are divided between two sets of organs, one for national affairs, and the other for State affairs. Each organ being supreme within its own sphere. In the case of the United State of America, individual states (e.g. Chicago, Los Angeles, etc.) has the right to make their own local laws (e.g. taxation, etc.) but they cannot possibly conclude treaties with other foreign states, declare war against other foreign states or recognize other states. These functions are the functions of the federal government. Examples: Germany, the United States of America, Malaysia, etc.
In the US, the State police (LADP, N.Y.D.P, etc.) has no jurisdiction over crimes which are federal or interstate in nature, in cases like these the Federal Bureau of Investigation will have the jurisdiction.