The Fed IS enforcing the laws but the problem overwhelms the resources. If the states do not line up in support of enforcing the laws then it can't be done. You have no idea how much a lot of states economic health is tied up in this issue.
Well I can't speak for other states. I know in my part of the world there are few illegals and we get along fine. And we have large tourist attractions that need service industry type labor. Granted there's a lot of legal immigrants around, but it's still overwhelmingly the native population here.
Immigration definitely needs reforming, I just don't think this is the answer.