Judge Mendez granted an extension until April 6 for the filing of any Amici Briefs in support of the United States' motion for a preliminary injunction in U.S. v. California, et. al. Here is the proposed Amici Brief of Texas and some other "red" states. See today's LA Times story.
P.S. I find it interesting that only the governors of Mississippi and Maine joined (Phil Bryant and Paul R. LePage, respectively) rather than those states themselves.