US Mexico WAR:

The New Mexican War
http://www.thediplomad.com/2017/02/the-new-mexican-war.html?m=1

We have been subject to a  insurgency from Mexico for at least 50 years.  They dump their population over pressure on us so that the rich in Mexico can continue to pillage the economy there and run their drug operations.

The USA has been used by Mexico just as Trump said.  They have been smart and we (our politicians) are either stupid or corrupt and I suggest both at the same time.  They have sold us out. 

Finally: If Mexico attempts to resist repatriation of their citizens as we remove them from the host, us, then we will be at war in terms of trade and invasion by their citizens.

Build that Wall:  We don't need them.   They need us.