Why is a border wall not a campaign issue in 2020?

In 2016, then-candidate Donald Trump made immigration a key campaign platform, warning of Mexican “rapists” and criminals coming to the United States. He pledged that a wall on the US-Mexico border would be erected and Mexico would pay for it. Four years later, the US and Mexican presidents have publicly praised each other while a naturalisation ceremony of immigrants to the United States was featured at the Republican National Convention. What has changed in US-Mexico relations? What has the populist left-wing president of Mexico, Andres Manuel Lopez Obrador, done that differs from his more conventional predecessor? Would Mexico support expanding elements of the new United States-Mexico-Canada Agreement to already existing trade agreements with nations like Australia? In this event, New York Times foreign correspondent Mexico Natalie Kitroeff spoke about these issues with Dr Gorana Grgic, a jointly appointed Lecturer at the Department of Government and International Relations and the United States Studies Centre at the University of Sydney.