is the collective term used to describe the relationships among the national, state, and local governments that claim a piece of the overall sovereignty.

Federalism

Explanation:

Federalism is a form of government that divides sovereign power across two or three levels of government, namely; local, state, and national government. This is done in order to decentralize authority and as such each level of government has independent authority.

Sovereign government is a government that operates independently without external influence.

For example, the United states practice true federalism and as such, power is divided across state and national government.