Rush Limbaugh solution: 11 m illegals- let’s try deporting 1m and see how that goes. The other 10m or most of them will self-deport.
Before recent times, that was not considered or was there a base model to learn from as an example. But, with the Arizona SB1070 and the latest law in Alabama, we now have a model and history of what enforcing the laws will do. In those states U-Haul's business is very brisk and in the case of Alabama, those thought to be illegal overnight pulled their kids from school and many left the state altogether.
Combine that with enforced laws against employers who knowingly hire illegals and the source of their desire to be here would be gone, except those who came just to be on welfare. E-Verify every government source for welfare distribution and the loop is closed. Breaking down doors and forcibly collecting the hard cases would most likely be a side product of a criminal arrest for some other infraction for felony.