Demonstrators walk outside the Supreme Court in Washington, Tuesday, March 26, 2013, where the court will hear arguments on California's voter approved ban on same-sex marriage, Proposi

 

              Demonstrators walk outside the Supreme Court in Washington, Tuesday, March 26, 2013, where the court will hear arguments on California
Demonstrators walk outside the Supreme Court in Washington, Tuesday, March 26, 2013, where the court will hear arguments on California's voter approved ban on same-sex marriage, Proposition 8. The Supreme Court waded into the fight over same-sex marriage Tuesday, at a time when public opinion is shifting rapidly in favor of permitting gay and lesbian couples to wed, but 40 states don't allow it. (AP Photo/Pablo Martinez Monsivais)