What is it called when two or more governments share power over the same area and people?

Question

Quizplus · Accepted Answer

Federalism is the idea that two or more governments are both sovereign over a certain geographic area. That means both governments are ultimately in charge of some things. In the United States, this division is between the federal government and the state governments. The federal government is in charge of some things such as international relations, and state governments are in charge of other things such as education.

What Is It Called When Two or More Governments Share