Amendment 10 - Powers of the States and People. Ratified 12/15/1791.
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.
I don't want to "go off on a rant" as Dennis Miller would say, but lets pull out a high school textbook and look at this. Anything not expressly granted to the Federal government is reserved for the States or the People. Although this amendment has been very liberally interpreted, it is one of the tenets of The Constitution. This amendment is also known as the States' Rights Amendment. Also, keep in mind, the first ten amendments were ratified collectively, and known to most as The Bill of Rights. These first ten were kind of important to the founding fathers.
Don't follow leaders, watch your parking meters.