Answer:
The power not delegated to the United States by the constitution are reserved to the states
Step-by-step explanation:
Federalism is a system of government that created one central government along with several states that work under the management the central government. One characteristic of a federalism is the existence of division of power between the federal government and the states government.
The phrase excerpts from the constitution proof the existence of that division of power. With the exception of several key issues that might affect the nation as a whole, the states government tend to be given with a freedom to manage their own without the intervention from the central government.