As Trump has opined, and correctly IMHO, many will self deport when the free lunch evaporates.
THAT is the method. Deny benefits and go after the employers. No anchor baby status.
Poof, they're gone.
I agree, but Trump will have to take it 1 step further. Commiefornia has their own “Special” welfare plan for Criminal Invaders, which could be fixed overnight by WITHHOLDING ALL FEDERAL FUNDS TO ANY STATE THAT PROVIDES WELFARE ASSISTANCE, or TAXPAYER FUNDED SERVICES to Criminal Invaders.
And that is what will be more effective than any wall. No employment, no welfare, no anchor babies = no illegals.