Mexico does  little if nothing to prevent illegals from crossing into the USA.  Fortunately we do not have this problem in Canada.   The usual attempts at controlling the illegals coming  across has failed. So now Trunp is fulfilling his election promise.  The wall will work.  Too bad it had t come to this.  Mexico  is a
3rd world country  with high unemployment, terrible poverty, huge difference between rich and poor. No wonder so many want to leave. We  do not accept illegals here. Our laws are very aggressive .