Arizona is latest in two - year legal battle over tough immigration law . The Justice Department said Arizona 's population of two million Latinos includes an estimated 400,000 there illegally , and 60 % to 70 % of deportations or `` removals '' involve Mexican nationals . Hot - button immigration issue is key in presidential campaign . Unclear when Arizona legislature is implementing provision of law passed by Democrats .
Arizona is latest in two - year legal battle over tough immigration law . Hot - button immigration issue is key in presidential campaign . Unclear when Arizona legislature is implementing provision of law passed by Democrats .