The California Supreme Court will hear the legal showdown over gay marriage on March 5. In a statement released today, the high court set three hours of arguments for its calendar in San Francisco, setting the stage for the justices to consider a series of legal challenges to voter-approved Proposition 8. Civil rights groups and a number of cities and counties, led by San Francisco and Santa Clara County, sued after the November election, arguing that the ballot initiative is invalid and should be struck down. Voters restored the ban on gay marriage, after the state Supreme Court last year...