Would Oprah make a good US president? She's denied that she'll run - but that hasn't stopped people calling for her to join the 2020 race. Coming from humble beginnings - how did Oprah become an icon?

On this episode of Nexus was….

* Assistant Professor of Political Science at the University of Arizona, Samara Klar

* Professor of American Studies at Birmingham University, Scott Lucas

* And journalist Laurie Laird