Call me stupid, but here is my four-step plan:
1. Make employment of, or contracting services from, illegals a felony with a mandatory prison sentence and $100,000 fine per person per day of employment.
2. Change US citizenship from jus soli to jus sanguinis.
3. Create a path for the limited and screened legal immigration of unskilled and skilled labor. There is no legal path now and Americans are too fat and lazy to perform all the cheap labor the economy has come to require.
4. You can't deport over 10 million people, it's impossible. So, you have to find a way to grandfather in and keep the contributors to the economy without any criminal record. But, the flow has to stop. Homeland Security should transfer half the people from airports to patrolling the border. It's an army without the posse comitas problem.
It all starts with No 1, though. Without that, there is no way to get control of it.