FILE - In this Sept. 6, 2011 file photo, opponents of gay marriage outside a courthouse in San Francisco where the California Supreme Court was hearing arguments on California's ban on

 

              FILE - In this Sept. 6, 2011 file photo, opponents of gay marriage outside a courthouse in San Francisco where the California Supreme Court was hearing arguments on California
FILE - In this Sept. 6, 2011 file photo, opponents of gay marriage outside a courthouse in San Francisco where the California Supreme Court was hearing arguments on California's ban on same-sex marriage. On Tuesday, the US Supreme Court will begin hearing two days of cases involving gay marriage. (AP Photo/Eric Risberg, File)