IMHO Arizona just mimicked Federal law. All that needs to happen is just enforce the present law. Also build the fence.
If the Feds don’t step in and do this and do it now, it means that they don’t want to do anything. It’s not that hard to do. If they put it off, this whole thing could go viral across the states. People are tired of the delay tactics by the government.
Yes, building the fence was one “shovel-ready” project that would have been worthwhile.