From the opening salvo of his campaign, the United States's relationship with Mexico and its people has been front and center. Very few moments in the 2016 campaign were more iconic than his opening remarks about Mexican people crossing the border: "They're bringing drugs. They're bringing crime. They're rapists." (Source: Time)

The tension Trump has created covers substantial ground, from humanitarian and immigration issues, to trade policy and infrastructure spending. 

See also Mexico Wall.