Kansas v. Garcia
1. Whether the Immigration Reform and Control Act (IRCA) expressly preempts the States from using any information entered on or appended to a federal Form I-9, including common information such as name, date of birth, and social security number, in a prosecution of any person (citizen or alien) when that same, commonly used information also appears in non-IRCA documents, such as state tax forms, leases, and credit applications.
2. If IRCA bars the States from using all such information for any purpose, whether Congress has the constitutional power to so broadly preempt the States from exercising their traditional police powers to prosecute state law crimes.