Arguing that counting unauthorized migrants and temporary visa holders in the 2010 census resulted in Louisiana losing a congressional seat, Attorney General James D. "Buddy" Caldwell filed an original action in the U.S. Supreme Court on Nov. 14, 2011, asking the Court to to "require the federal government to
recalculate the 2010 apportionment of U.S. House of Representative seats
based on legal residents." The case is No. 22O140 ORG, Louisiana et al., v. Bryson et al.. Here's a link to the Motion For Leave To File A Complaint, Complaint, And Brief In Support Of Motion.