Another federal election campaign means we are about to be bombarded by opinion polls. Weekly polls, local polls, aggregate polls, there is a ton to keep track of. To answer your questions about political polls and how they work, Just Asking brought on two guests. Mario Canseco is a pollster and the President of Research Co., and Feodor Snagovsky is a professor of political science at the University of Alberta who specializes in the comparative analysis of elections and political behaviour.