http://www.supremecourt.gov/opinions/12pdf/12-71_7l48.pdf
This is the case involving Arizona’s requirement that would-be voters provide proof of citizenship before being able to register to vote. Arizona’s proof of citizenship requirement is preempted by the federal law requiring that states use the federal voter registration form. Justice Kennedy concurs in part and in judgment. Justices Thomas and Alito both filed dissenting opinions.
Isn’t the upcoming Texas Voter Rights case before the Supreme court going to make a big difference whether the Federal government has a say in how states conduct elections?