What is being done to stop the new arizona inmigration law?

I am concern about the violation of rights of Hispanic American Citizen or legal Permanent residents in that State. I read, "You can't start singling out people because of who they look like or how they talk or how they dress,..........You can't turn law abiding American citizens and law abiding immigrants into subjects of suspicion and abuse,........... A long legal battle over the law is likely, possibly centering on a clause of the US Constitution which protects a citizen against unreasonably being stopped and searched."