"President Trump might be able to tweet whatever comes to mind, but he can't grant himself new authority because he feels like it," he said in a statement.
Judge permanently blocks Trump sanctuary cities order →
San Francisco City Attorney Dennis Herrera said his city's laws restrict other types of cooperation with Immigration and Customs Enforcement, like using law enforcement resources from carrying out immigration raids.
Justice Dept.: 'Sanctuary' jurisdictions may have to repay federal funds →