This is a type of government in which the power is divided between the national government and state governments.

federalism
bicameral
unicameral
anti-federalism

federalism

Federalism is the system of government in which power is divided between a central government and regional governments; in the United States, both the national government and the state governments possess a large measure of sovereignty.

four sitting presidents have been assassinated while in office but the first was abraham lincoln,