Today, the California Supreme Court — which last May made history by striking down the state’s ban on marriage for same-sex couples — will hear oral arguments in three cases challenging Prop 8. The arguments will be broadcast live on the California Channel. One of the cases, Strauss vs. Horton, was filed by the National Center for Lesbian Rights, Lambda Legal and the American Civil Liberties Union. The Center has disbursed $40,000, raised through its InvalidateProp8.org web initiative, to these organizations in support of this legal effort. Another case was filed by the City and County of San Francisco and joined by other municipalities (including the City and County of Los Angeles), and the third by a private attorney. Jerry Brown, the state’s attorney general, has urged the court to overturn Prop 8. Questions the court will consider include whether Prop 8 is a constitutional revision rather than an amendment and whether it violates the separation of powers doctrine. If Prop 8 is not invalidated, the court will address whether the measure will affect the thousands of same-sex couples who wed prior to November 4. A ruling is expected by no later than early June. Many viewers in California get the California Channel on their cable system, but everyone can watch the proceedings streamed online here.