http://www.nytimes.com/2013/08/29/u...ullification-boundary.html?smid=go-share&_r=0
Unless a handful of wavering Democrats change their minds, the Republican-controlled Missouri legislature is expected to enact a statute next month nullifying all federal gun laws in the state and making it a crime for federal agents to enforce them here. A Missourian arrested under federal firearm statutes would even be able to sue the arresting officer.
The law amounts to the most far-reaching states rights endeavor in the country, the far edge of a growing movement known as nullification in which a state defies federal power.