“magically get Mexico to cough up the cash for it”
No magic about it.
Simple logic: There are multiple examples of the Mexican government aiding and abetting illegal immigrants to use our social services. Plus the countless tax-free money transfers back to Mexico. They even printed pamphlets.
MR TRUMP:
Demand every penny back from the bastards and BUILD THAT WALL
LOL, we have about 25 million illegal aliens here that can work for room and board while building that wall.