When Iran's President Rouhani was convincingly re-elected last year, Iranians seemed hopeful their living standards might improve. However, inflation, poverty, water shortages and corruption are all things that appear to be getting worse. Now, Iran is again facing US sanctions after President Trump walked away from the nuclear deal with Tehran. HARDtalk's Stephen Sackur speaks to Iranian political analyst and erstwhile nuclear talks adviser Mohamed Marandi. Is Iran on the brink of an economic and political crisis?