Question: to whom do the powers not given to the federal government by the constitution go?
Answer: the states or the people

The Tenth Amendment ( Amendment X ) to the United States Constitution , which is part of the Bill of Rights , was ratified on December 15 , 1791 . It expresses the principle of federalism and states ' rights , which strictly supports the entire plan of the original Constitution for the United States of America , by stating that the federal government possesses only those powers delegated to it by the United States Constitution . All remaining powers are reserved for the states or the people .