Arizona has a law cracking down on illegal immigrants, a law on the books because the federal government has not been enforcing the law. Predictably it has led to overheated response, with The Man On The Way Up attacking it for "undermining" fairness.
It does no such thing. See also some clarification of lawful contact following the expected MSM obfuscation of said contact. There is also an explanation of the situation on the ground on the Arizona border by an Arizona state senator.
From the Department Of Redundancy Department - according to MSNBC, the law "makes it a crime to be an illegal immigant."