Funny thing is... they already have walls, and those don't stop anyone.  Trump really doesn't have a plan on how to pay for this either... hes just kicking the can so to speak.  what he has outlined wouldn't even come close to making any kind of dent on the cost to build this monstrosity.  But at least his friends and family in the concrete and steel industry will be pleased.  I wonder if he has shares in the companies that he will contract to build the wall...?