Where polls went wrong in 2016 and what that means in 2020 Trend Line

It's election season! CTVNews.ca's Michael Stittle and Nanos Research’s Nik Nanos get you up to speed with a U.S. election night primer: what you need to watch for and the critical different between national and state polling. Also, Nik and Michael discuss what the outcomes of two federal byelections and several provincial campaigns means for a potential general election call. It’s Trend Line time!