“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.”
— United States Constitution, 10th amendment

This part of the Bill of Rights was intended to

(1) give the people the right to vote on important issues
(2) reduce the rights of citizens
(3) limit the powers of the federal government
(4) assure federal control over the states