President Donald Trump has been issuing a number of executive orders in his first week in office. Supreme Court often overturns executive orders and Congress can decline them. On Wednesday an executive order signed by Trump targeted so-called sanctuary cities "that use local ordinances and policies to shelter illegal immigrants from federal law enforcement." In California alone there are 18 sanctuary cities with the city of Los Angeles already vowing to set up a legal fund for undocumented immigrants to defend themselves should they face deportation.