Benghalia, OuissemBoulmergueb, KhawlaGhennam, Fatima2020-01-302020-01-302019http://hdl.handle.net/123456789/9045This dissertation investigates the changes that took place in the American foreign policy towards Mexico, concerning the Southern border issues focusing mainly on the illegal immigration issue. It tackles the nature of therelationship between the United States and Mexico that shifted dramatically from being unfriendly during the Mexican-American War (1846-1848), to a more bilateral relationship based on mutual respect in the First and the Second World Wars. This relationship, however, deteriorated underTrump's administration, due to his controversial decisions towards Mexican illegal immigration. In this sense, the dissertation sheds light on the varied policies taken under a democrat president, B. Obama anda republican one that is D. Trump toward Mexican illegal immigration.enForeign policyIllegal immigrationBorder issueOther