The correct answer would be federalism.
Federalism is a form of government in which the national government and other bodies like states or provinces share authority. The United States government operates under federalist ideas.
The US Constitution's Tenth Amendment states that all powers not explicitly granted to the federal government belong to the states. The notion of "Federalism" says that it is another word for state sovereignty. State power has generally included criminal and punitive authority.
The capital punishment is typically implemented by a state government because police power is generally local or state-controlled. When applying the death penalty, states must adhere to the protections provided by the Constitution and the Bill of Rights.
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