Valls said during a visit to Ottawa that he and Canadian Prime Minister Justin Trudeau have discussed the US election.
Valls didn't share Trudeau's thoughts, but he was categorical about his pick in the Nov 8 election - Clinton.
Valls, speaking in French, said US President Barack Obama was "elected by the world" and "Trump is rejected by the world."
On the allegations of sexually predatory behavior swirling around the Republican nominee, a stone-faced Trudeau - a self-avowed feminist - would say only that he "has stood clearly and strongly all my life around issues of sexual harassment."
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Valls said he expects Trudeau to be in Brussels on Oct 27 to sign the deal.
Trudeau called the deal a "win-win" for both sides. He also said it's a "progressive agreement that heralds a new approach with regard to defending the rights of governments to legislate on the environment, the rights of workers, the issues that our constituents care about."
Trudeau ended a joint news conference with Valls on a pointed note, saying that in a post-Brexit world, not signing the agreement would send a strong and unsavory message.
Climate change and the Canada-EU free trade deal have been singled out by Trudeau's office as being among Canada's top priorities.
Speaking to reporters at the French Embassy early today, Valls also reiterated France's desire to see Canada send peacekeepers to West Africa to join the fight against Islamic militants.
The Trudeau government has said it will commit 600 peacekeepers to UN missions, and France has been pushing Canada to join the UN mission in West Africa.