On the afternoon of June 21, eleven judges of the 9th circuit will rehear the case over whether Arizona is violating law by requiring voter registration applications to include proof of the new voter’s citizenship. The hearing is in Pasadena, California. See this story. An original panel of the 9th circuit last year had struck down the law on the grounds that the federal moter-voter law precludes states from requiring additional documents to be attached to voter registration applications. The original panel’s vote had been 2-1 and had included retired U.S. Supreme Court Justice Sandra Day O’Connor.

The federal government has intervened in the case on the side of the voters who had challenged the law.