What began as a race with six candidates has tightened to leave four contenders in the final stretch. They have debated each other in both official languages and spent two months on the campaign trail,
The next leader of the federal Liberal Party could become the shortest-serving prime minister in Canadian history, beating an unlucky record set 119 years ago.
The party is using a two-step process for supporters wanting to cast a ballot in the race to replace Justin Trudeau.
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