A copy of the brief is here: 14-460 amicus combined PROOF
The site SCOTUSblog tracks cases docketed in the Supreme Court of the United States. Track this case here. You will be able to view or download documents such as the Petition for Certiorari and the legislators’ opposition brief.
Tom Yamachika
Jun 30 2015 Petition GRANTED. Judgment VACATED and case REMANDED for further consideration in light of Arizona State Legislature v. Arizona Independent Redistricting Commn, 576 U. S. ___ (2015).