Thread:Comments:US state of Arizona signs into law controversial immigration bill/Comments from feedback form - "So EVERY SINGLE person is now ..."/reply (3)

Because Arizona is actually a part of their nation. The stuff that they do wrong makes the whole nation look bad. Also, federal government definitely has a place in this, because this law could very well be unconstitutional (see the part where Obama orders the Supreme Court to decide on whether or not this is legal). If it's unconstitutional, then the federal government can override the law.