The Supreme Court is hearing arguments on California’s Proposition 8 anti-gay marriage law today, and SCOTUS Blog’s Tom Goldstein thinks it’s likely that the court is not going to strike down the Ninth Circuit’s ruling — which would mean gay marriage would remain legal in California.

Justice Kennedy seemed very unlikely to provide either side with the fifth vote needed to prevail. He was deeply concerned with the wisdom of acting now when in his view the social science of the effects of same-sex marriage is uncertain because it is so new. He also noted the doubts about the petitioners’ standing. So his suggestion was that the case should be dismissed.

If those features of the oral argument hold up - and I think they will - then the Court’s ruling will take one of two forms. First, a majority (the Chief Justice plus the liberal members of the Court) could decide that the petitioners lack standing. That would vacate the Ninth Circuit’s decision but leave in place the district court decision invalidating Proposition 8. Another case with different petitioners (perhaps a government official who did not want to administer a same-sex marriage) could come to the Supreme Court within two to three years, if the Justices were willing to hear it.

Second, the Court may dismiss the case because of an inability to reach a majority. Justice Kennedy takes that view, and Justice Sotomayor indicated that she might join him. Others on the left may agree. That ruling would leave in place the Ninth Circuit’s decision.