SAN FRANCISCO -- The San Francisco Board of Supervisors on Tuesday was successful in overriding Mayor Gavin Newsom's veto of legislation changing the sanctuary city ordinance. Newsom, who said the ordinance conflicts with federal law, said through his spokesman that he would ignore the legislation - prompting the legislation's author to threaten a legal challenge to the mayor. The new law takes effect in 30 days, and Supervisor David Campos said the board may fight the mayor in court if no compromise can be struck. Campos' ordinance - which garnered eight votes Tuesday - requires that undocumented juveniles be turned...