Let's see....how do tariffs work?
A 10% surcharge on money flowing back by wire to Mexico would be a good start.
It seems that he’d rather deal with the millions of working poor who would be at risk from US-imposed sanctions and tarrifs. Paying for the wall would be a lot cheaper.
“Good fences make good neighbors” - doesn’t he want to be a good neighbor?
Put a tariff on imports and it's American consumers paying for the wall and not Mexico.