answer:The Tenth Amendment is the last Amendment of the Bill of Rights ratified in 1791. It defines both the breadth of Federalism, and the limits thereto. It basically says that all powers not enumerated in the Constitution as belonging to the federal government are reserved to the several states or to the people. It makes no attempt to distinguish which go to the state governments and which to the people. I presume the Founders felt that matter could best be handled democratically at the state level. Some so called “Constitutionalists” like to claim that anything not spelled out in minute detail in the Constitution as a power of the federal government is therefore unconstitutional if acted upon by the federal government. To people holding this view, the power to regulate interstate commerce, which is granted to the federal government, wouldn’t include regulating commerce carried by trucks or planes, because trucks and planes aren’t ever mentioned in the Constitution. This is a supercilious argument. The Constitution gives broad powers to act to the Congress, and the Executive, and charges the Judiciary with seeing these powers are not abused of overstepped. But it is important to note that there are limits on Federal power. Those things the federal government is not empowered to do must either be federalized by future Constitutional Amendments, or must remain with the states and the people.