This is beyond law enforcement. Neither the Congress, four Presidents, nor the American public seem to care about the enforcement of immigration laws. The genie's out of the bottle on deporting 12 million illegals. It is NOT going to happen.
So, efforts must now focus on what to do going forward.
Wrong on all counts.
1st - If there are laws, there is law enforcement. We are not talking about antiquated laws here.
2nd - Congress can be made to care about what the American people care about, and it is clear from most polls that the American people want illegal immigration laws enforced.
3rd - It is no more necessary to mass-deport 12 million than it is to ticket all 100 million traffic speeders in one weekend. (arright, I made up the 100 million figure, but I'm not wrong by very much, I betcha.) What you do is to BEGIN enforcing the law, and enforce it harder and harder until behavior changes. In this case, you keep enforcing the laws until the illegal immigration slows to a trickle. Then you keep enforcing at a level that keeps the boarder crossings at a trickle. No need for mass deportation.
It's the FEAR of being arrested and deported that will slow the invasion way down. Drive the fear up to the point at which the number of border crossers is very low.
At the same time, enforce the laws on employers who hire illegal aliens, and step up enforcement until there is a change of behavior. Then maintain a level of enforcement that continues to strike fear in the hearts of employers such that most of them stop hiring illegals.
It isn't necessary to have pure 100% law enforcement before you enforce the law, sink. Otherwise, the IRS would not exist. (Wait, that's a pleasant thought.)