James Madison Quote on the 10th Amendment

“The powers delegated by the proposed Constitution to the federal government are few and defined.  Those which are to remain in State governments are numerous and indefinite.” – James Madison, The Federalist No. 45

The 10th Amendment to the Constitution of the United States of America:  The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.