A week from election day, Conservatives still had a shot. What happened? - 2019-12-19
The Conservatives entered election day trailing the Liberals by only 16 seats and ahead by more than three percentage points on the votes that had been cast already in the advance polls — but then lost their lead in a dozen seats on election day as the Liberals strengthened their minority and the New Democrats avoided disaster.
According to a CBC News analysis of the detailed validated results provided by Elections Canada, the Conservatives put up strong numbers in the advance polls but failed to get their vote out in similarly large numbers on election day in almost every region of the country.
That resulted in seat losses that benefited the Liberals. It also helped out the New Democrats, who experienced a big boost in support on election day compared to their anemic advance poll results.