Election day is set for October 21.
"Canadians have an important choice to make". Trudeau is viewed negatively by 63% of Canadians and Scheer by 52%, according to the respected Angus Reid poll.
Also on the watchlist today: The Federation of Canadian Municipalities releases its election recommendations, which, as per the advisory, offers "a call to improve Canadians' quality of life by empowering the local governments closest to their daily challenges". A large majority of Quebecers support Bill 21. "You all know how proud I am to be a son and a grandson of British Columbia", he told the cheering throng, playing up his family connections to the province. Pity the federal leader who dares to challenge him now.
Indeed, Scheer had more pressing matters to attend to Wednesday - namely, siphoning votes away from a resurgent Bloc Quebecois.
Trudeau had already left the airport.
"But we can do that only if we have the courage to take on the powerful interests at the very top".
While he picked "Choose Forward" as his campaign slogan, Trudeau began it forced to look back on a past controversy, the SNC-Lavalin affair.
Trudeau extolled his government's record of investing in people and communities, boasting that his policies have helped spur economic growth, create jobs and lift 900,000 Canadians out of poverty. "He will say anything to cover up his scandals, he will say anything to get re-elected".
The NDP are polling nationally in third place, on roughly 13%-14% support, with a slight lead over the Green Party.
But Mr Trudeau may not win enough seats to govern by himself after a series of missteps that called into question his leadership while cutting into his once sky-high popularity.
Scheer was speaking on Day 2 of the campaign in the riding of York Centre where the Conservatives have selected Rachel Willson to run.
Canadians, he said, are exhausted of governments that don't have their backs and will soon embrace the NDP's third way.
Liberals say that a waiver for confidentiality was not provided by the Clerk of the Privy Council, meaning that people in the know-how did not have the privilege to speak to the RCMP or the Ethics Commissioner. Now, it's his turn to face opponents who are unproven campaigners.
Climate change and affordability are predicted to be key campaign issues.
"We are going to stand firm". Party officials said the travel schedule would not be affected.
When asked directly if he thought the law infringed on religious freedom, a cause Scheer has championed in the past, the Conservative leader did not answer directly.
With a short campaign that will determine control of Canadian politics for as many as five years, the parties will launch their efforts fiercely and without restraint, at least by gentle Canadian standards.
The prime minister was found by a federal ethics watchdog to have improperly tried to influence a former minister over the prosecution of SNC-Lavalin, a major engineering and construction company facing a criminal trial.