Ah yes, the almighty interstate commerce clause. The fed.gov nose of the camel A little something to attend to after getting the illegals out and disposing of the IRS.
Try the 10th Amendment
“The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved for the States respectively, or to the people.”
http://en.wikipedia.org/wiki/Tenth_Amendment_to_the_United_States_Constitution