Trudeau said Quebecers have not really been represented in government in recent years because of the strength of the Bloc Quebecois and the surge of the NDP at the last election.
The federal Liberal leader was in Quebec City for a caucus meeting ahead of a four-day party meeting in Montreal, beginning Thursday.
Trudeau said he hopes the gathering will help persaude voters to come to the Liberals, who now hold eight of the 75 seats in Quebec.
"The party has an enormous challenge ahead of it — and not just in Quebec," he said.
"We're going to have to show that we can go from about 30 MPs (36) to forming a government on election night."
Trudeau said he wants to orient the policy of the party to the benefit of the middle class but he did not give any specifics.
He indicated he won't be revealing the details of the Liberal plan until the next election, which will be held in 2015.
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