HARDtalk’s Stephen Sackur speaks to David Smolansky, anti-regime activist who was the mayor of a district in Caracas until he fled the country to escape a jail term for aiding last year’s street protests. There was a time last year when it seemed President Maduro's grip on power in Venezuela was loosening. Yet here we are two months away from a presidential election with Maduro oozing confidence and his opponents seemingly in disarray. Why does Venezuela's opposition so consistently promise more than it delivers?