For the second straight night, Toronto mayoral candidates Olivia Chow and Brad Bradford are taking part in a debate, this one with a Scarborough-centric focus.Now made up of six wards with over 620,000 residents, Scarborough is a vital battle ground for mayoral hopefuls, and transit is expected to be one of the dominant themes in the debate hosted by the Scarborough Community Renewal Organization and moderated by CityNews’ Cynthia Mulligan. Other topics the candidates will be asked to discuss include affordability, public safety and congestion. You can watch the debate live on CityNews 24/7.Related:Chow and Bradford trade barbs on housing, affordability and transit in Toronto mayoral debateBradford, Chow go back-and-forth on property tax increases during Toronto mayoral debate