separation of powers
Federalism. The system that divides power between the national government and the state government is called the "Federal System."
There is no other government in the US government.
If the American Government Systems is what you are talking about, then it is divided into the Legislature, the Judicial, and the Executive branches of Government which divides the power evenly among the three branches.
Federal
federal
A government that divides power between the states and the national government
The Constitution divides its power into three branches of government -- the executive branch, the legislative branch, and the judicial branch.
the three branches of government
A national government and state governments
The three branches of government, Judicial, Legislative, and Executive.
federal
A devolved government divides power between a central authority and the regional authority.