Simple. Enforce the I-9 requirement for working ( it is the law). Cut off all welfare for illegals and they will go back home.
Jail employers who hire illegals
I am FOR a ‘guest worker’ program- come to the USA for temporary migrant worker status, do your job, go home.
I bet most of them would like to do that anyway. But at least we would know who they are, have their picture ID and fingerprints, and stop the illegal crossings
Heavily penalize businesses that employ illegals. Tax money transfers back to Messy-co. No drivers licenses, no welfare benefits.
If they are caught voting, using fraudulent documents, committing perjury to obtain benefits and reentering the U.S. after being caught, sentence them to a mandatory five years in prison.
Take away the magnet. Demand Mexican government reform and action against cartels or the U.S. will send 15k troops across the border.