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How accurate are pre-election polls?

Last Updated May 29, 2018 at 7:18 pm EST

Before the 2018 Ontario election campaign even started, polling agencies had been providing snapshots of voter support for the three main parties. But how accurate are these pre-election polls? CityNews has compiled polling data from four previous elections. Below you’ll find interactive graphs presenting polls taken two weeks before election day and the actual results from the election.