In January 2017, the former U.S. president signed Executive Order 13767 to start the construction of a wall construction along the U.S. – Mexico border.
This source is related to the project because it shows how nativism was on the rise in the United States. Nativism and Protectionism are the two doctrines that President Trump employed to start his “border-building” project along the U.S. and Mexico borderline.
The White House, President Trump Travels to Arizona, 2020. https://commons.wikimedia.org/wiki/File:America,Trump_and_border_wall_detail,_from-_President_Trump_Travels_to_Arizona(50040937841)_(cropped).jpg