LOS ANGELES - Cardinal Roger Mahony called on members of the nation's largest Roman Catholic archdiocese Monday to beat back a proposal to legalize assisted suicide for the terminally ill in California, and accused the Legislature's most powerful Democrat of being swept into a "culture of death." "Assisted suicide is totally unnecessary - not only is it against God's law, God's plan, we simply don't need something like that," Mahony said during a lightly attended noon Mass at the Cathedral of Our Lady of the Angels. He urged parishioners to pressure Sacramento legislators "to vote down ... this attack on...