On the day of the "Strauss v. Horton" decision–in which the California State Supreme Court upheld Proposition 8 as a lawful amendment of the state Constitution–the American Foundation for Equal Rights (AFER) filed suit in the U.S. District Court for the Northern District of California to challenge the validity of Proposition 8 under the U.S. Constitution in a case known as "Perry v. Schwarzenegger". Judge Vaughn R. Walker ordered a full trial which began in January 2010. It addressed questions as wide-ranging as whether being gay diminishes one's contribution to society, affects one's ability to raise children, impairs judgment, or constitutes a mental disorder. Judge Walker ruled that Proposition 8 was unconstitutional, violating both the Due Process and Equal Protection clauses of the U.S. Constitution, and on August 12, 2010, had scheduled to deny a motion to stay the ruling throughout the appeals process. On August 16, 2010, Ninth Circuit Court of Appeals granted the motion to stay, ordered expedited briefing on the merits of the appeal, and directed the parties to brief the issue of why the appeal should not be dismissed for lack of standing. On August 17, 2010, the same Ninth Circuit panel ordered expedited briefing on the Imperial County appeal. The court also ordered both appeals calendared for oral argument during the week of December 6, 2010, in San Francisco. On June 26, 2013, the U.S. Supreme Court found that the Proposition 8 supporters did not have standing for their appeal, and thus ordered the Ninth Circuit to void their ruling, leaving Walker's decision standing. Kristin Perry and Sandra Stier, two of the plaintiffs in "Perry v. Schwarzenegger", were married shortly afterward, making them the first same-sex couple to be married in California since Proposition 8 was overturned.