Bond was a microbiologist who pled guilty to putting chemicals in her husband's mistress' mailbox, and was charged under federal chemical weapons statutes. But those statutes, her lawyers argued, were intended to fight international terrorists using chemical weapons of mass destruction! From the ruling....
In this case, Bond argues that the statute under which she was charged, 18 U. S. C. §229, exceeds Congress’ enumerated powers and violates the Tenth Amendment .Bond was sure to receive less jail time if she were convicted of charges in state, rather than federal court. The United States Code - a unanimous court ruled - "violates the Tenth Amendment because the police power to prosecute criminals is a power reserved to the states." The Code has international underpinnings... the Chemical Weapons Convention of 1993. The ruling allowed Bond to have standing as an individual bringing a Tenth Amendment claim of violations of state sovereignty.
