SAN DIEGO (AP) — The sheriff of the nation’s fifth-largest county on Tuesday defied a new policy to limit cooperation with federal immigration authorities, setting up a showdown... Earlier Tuesday, San Diego County supervisors voted to prohibit its sheriff’s department from working with U.S. Immigration and Customs Enforcement on the federal agency’s enforcement of civil immigration laws... Shortly after, Sheriff Kelly Martinez said the board does not set set policy for the sheriff, who, like the supervisors, is an elected official. She said she wouldn’t honor the new policy....