A panel of judges heard arguments over whether the measure is constitutional . Opponents of Proposition 8 say it denies same - sex couples ' rights . Critics say it protects the institution of marriage . A federal judge 's earlier ruling says the proposition violates the Constitution .
A panel of judges hears arguments over whether the measure is constitutional . Opponents of Proposition 8 say it denies same-sex couples ' rights . Supporters say it protects the institution of marriage . A federal judge 's earlier ruling says the proposition violates the Constitution .